Antimicrobial-resistant infections

Background: Acid suppressants inhibit gastric acid secretion and disrupt the intestinal microbiome, but whether that facilitates colonization and infection with MDROs is unclear.

Dr. Li is assistant professor of medicine, section of hospital medicine, at the University of Virginia School of Medicine, Charlottesville.

Background: Acid suppressants inhibit gastric acid secretion and disrupt the intestinal microbiome, but whether that facilitates colonization and infection with MDROs is unclear.

Dr. Li is assistant professor of medicine, section of hospital medicine, at the University of Virginia School of Medicine, Charlottesville.

Background: Acid suppressants inhibit gastric acid secretion and disrupt the intestinal microbiome, but whether that facilitates colonization and infection with MDROs is unclear.

Dr. Li is assistant professor of medicine, section of hospital medicine, at the University of Virginia School of Medicine, Charlottesville.

The stark realities of antimicrobial resistance – including rising rates of difficult-to-treat infections, lack of a robust pipeline of future antimicrobials, and COVID-19 treatments that leave people more vulnerable to infections – remain urgent priorities, experts say.

For some patients, the pandemic and antimicrobial resistance (AMR) are intertwined.

“One patient I’m seeing now in service really underscores how the two interact,” Vance Fowler, MD, said during a June 30 media briefing sponsored by the Infectious Diseases Society of America (IDSA). A man in his mid-40s, married with a small child, developed COVID-19 in early January 2021. He was intubated, spent about 1 month in the ICU, and managed to survive.

“But since then he has been struck with a series of progressively more drug resistant bacteria,” said Dr. Fowler, professor of medicine at Duke University, Durham, N.C., and chair of the IDSA Antimicrobial Resistance Committee.

The patient acquired Pseudomonas ventilator-associated pneumonia. Although the infection initially responded to standard antibiotics, he has experienced relapses over the past few months. Through these multiple infections the Pseudomonas grew increasingly pan-resistant to treatment.

The only remaining antimicrobial agent for this patient, Dr. Fowler said, is “a case study in what we are describing ... a drug that is used relatively infrequently, that is fairly expensive, but for that particular patient is absolutely vital.”
 

A ‘terrifying’ personal experience

Tori Kinamon, a Duke University medical student and Food and Drug Administration antibacterial drug resistance fellow, joined Dr. Fowler at the IDSA briefing. She shared her personal journey of surviving a methicillin-resistant Staphylococcus aureus (MRSA) infection, one that sparked her interest in becoming a physician.

“I had a very frightening and unexpected confrontation with antimicrobial resistance when I was a freshman in college,” Ms. Kinamon said.

A few days after competing in a Division One gymnastics championship, she felt a gradual onset of pain in her left hamstring. The pain grew acutely worse and, within days, her leg become red, swollen, and painful to the touch.

Ms. Kinamon was admitted to the hospital for suspected cellulitis and put on intravenous antibiotics.

“However, my clinical condition continued to decline,” she recalled. “Imaging studies revealed a 15-cm abscess deep in my hamstring.”

The limb- and life-threatening infection left her wondering if she would come out of surgery with both legs.

“Ultimately, I had eight surgeries in 2 weeks,” she said.

“As a 19-year-old collegiate athlete, that’s terrifying. And I never imagined that something like that would happen to me – until it did,” said Ms. Kinamon, who is an NCAA infection prevention advocate.

When Ms. Kinamon’s kidneys could no longer tolerate vancomycin, she was switched to daptomycin.

“I reflect quite frequently on how having that one extra drug in the stockpile had a significant impact on my outcome,” she said.
 

Incentivizing new antimicrobial agents

A lack of new antimicrobials in development is not a new story.

“There’s been a chill that’s been sustained on the antibiotic development field. Most large pharmaceutical companies have left the area of anti-infectants and the bulk of research and development is now in small pharmaceutical companies,” Dr. Fowler said. “And they’re struggling.”

One potential solution is the Pasteur Act, a bipartisan bill reintroduced in Congress and supported by IDSA. The bill encourages pharmaceutical companies to develop new antimicrobial agents with funding not linked to sales or use of the drugs.

Furthermore, the bill emphasizes appropriate use of these agents through effective stewardship programs.

Although some institutions shifted resources away from AMR out of necessity when COVID-19 struck, “I can say certainly from our experience at Duke that at least stewardship was alive and well. It was not relegated to the side,” Dr. Fowler said.

“In fact,” he added, “if anything, COVID really emphasized the importance of stewardship” by helping clinicians with guidance on the use of remdesivir and other antivirals during the pandemic.

Also, in some instances, treatments used to keep people with COVID-19 alive can paradoxically place them at higher risk for other infections, Dr. Fowler said, citing corticosteroids as an example.
 

Everyone’s concern

AMR isn’t just an issue in hospital settings, either. Ms. Kinamon reiterated that she picked up the infection in an athletic environment.

“Antimicrobial resistance is not just a problem for ICU patients in the hospital. I was the healthiest I had ever been and just very nearly escaped death due to one of these infections,” she said. ”As rates of resistance rise as these pathogens become more virulent, AMR is becoming more and more of a community threat,” she added.

Furthermore, consumers are partially to blame as well, Dr. Fowler noted.

“It’s interesting when you look at the surveys of the numbers of patients that have used someone else’s antibiotics” or leftover antimicrobial agents from a prior infection.

“It’s really startling ... that’s the sort of antibiotic overuse that directly contributes to antibacterial resistance,” he said.
 

Reasons for optimism

Promising advances in diagnostics, treatment, and prevention of AMRs are underway, Dr. Fowler said.

“It always gets me really excited to talk about it. It’s amazing what technology and scientific discovery can bring to this discussion and to this threat,” he said.

For example, there is a “silent revolution” in diagnostics with the aim to rapidly provide life-saving actionable data on a real patient in nearly real time.

Traditionally, “you start off by treating what should be there” while awaiting results of tests to narrow down therapy, Dr. Fowler said. However, a whole host of new platforms are in development to reduce the time to susceptibility results. This kind of technology has “the potential to transform our ability to take care of patients, giving them the right drug at the right time and no more,” he said.

Another promising avenue of research involves bacteriophages. Dr. Fowler is principal investigator on a clinical trial underway to evaluate bacteriophages as adjunct therapy for MRSA bacteremia.

When it comes to prevention on AMR infections in the future, “I continue to be optimistic about the possibility of vaccines to prevent many of these infections,” Dr. Fowler said, adding that companies are working on vaccines against these kinds of infections caused by MRSA or Escherichia coli, for example.
 

Patient outcomes

The man in his 40s with the multidrug resistant Pseudomonas infections “is now to the point where he’s walking in the halls and I think he’ll get out of the hospital eventually,” Dr. Fowler said.

“But his life is forever changed,” he added.

Ms. Kinamon’s recovery from MRSA included time in the ICU, 1 month in a regular hospital setting, and 5 months at home.

“It sparked my interest in antibiotic research and development because I see myself as a direct beneficiary of the stockpile of antibiotics that were available to treat my infection,” Ms. Kinamon said. “Now as a medical student working with patients who have similar infections, I feel a deep empathy and connectedness to them because they ask the same questions that I did.”

A version of this article first appeared on WebMD.com.

The stark realities of antimicrobial resistance – including rising rates of difficult-to-treat infections, lack of a robust pipeline of future antimicrobials, and COVID-19 treatments that leave people more vulnerable to infections – remain urgent priorities, experts say.

For some patients, the pandemic and antimicrobial resistance (AMR) are intertwined.

“One patient I’m seeing now in service really underscores how the two interact,” Vance Fowler, MD, said during a June 30 media briefing sponsored by the Infectious Diseases Society of America (IDSA). A man in his mid-40s, married with a small child, developed COVID-19 in early January 2021. He was intubated, spent about 1 month in the ICU, and managed to survive.

“But since then he has been struck with a series of progressively more drug resistant bacteria,” said Dr. Fowler, professor of medicine at Duke University, Durham, N.C., and chair of the IDSA Antimicrobial Resistance Committee.

The patient acquired Pseudomonas ventilator-associated pneumonia. Although the infection initially responded to standard antibiotics, he has experienced relapses over the past few months. Through these multiple infections the Pseudomonas grew increasingly pan-resistant to treatment.

The only remaining antimicrobial agent for this patient, Dr. Fowler said, is “a case study in what we are describing ... a drug that is used relatively infrequently, that is fairly expensive, but for that particular patient is absolutely vital.”
 

A ‘terrifying’ personal experience

Tori Kinamon, a Duke University medical student and Food and Drug Administration antibacterial drug resistance fellow, joined Dr. Fowler at the IDSA briefing. She shared her personal journey of surviving a methicillin-resistant Staphylococcus aureus (MRSA) infection, one that sparked her interest in becoming a physician.

“I had a very frightening and unexpected confrontation with antimicrobial resistance when I was a freshman in college,” Ms. Kinamon said.

A few days after competing in a Division One gymnastics championship, she felt a gradual onset of pain in her left hamstring. The pain grew acutely worse and, within days, her leg become red, swollen, and painful to the touch.

Ms. Kinamon was admitted to the hospital for suspected cellulitis and put on intravenous antibiotics.

“However, my clinical condition continued to decline,” she recalled. “Imaging studies revealed a 15-cm abscess deep in my hamstring.”

The limb- and life-threatening infection left her wondering if she would come out of surgery with both legs.

“Ultimately, I had eight surgeries in 2 weeks,” she said.

“As a 19-year-old collegiate athlete, that’s terrifying. And I never imagined that something like that would happen to me – until it did,” said Ms. Kinamon, who is an NCAA infection prevention advocate.

When Ms. Kinamon’s kidneys could no longer tolerate vancomycin, she was switched to daptomycin.

“I reflect quite frequently on how having that one extra drug in the stockpile had a significant impact on my outcome,” she said.
 

Incentivizing new antimicrobial agents

A lack of new antimicrobials in development is not a new story.

“There’s been a chill that’s been sustained on the antibiotic development field. Most large pharmaceutical companies have left the area of anti-infectants and the bulk of research and development is now in small pharmaceutical companies,” Dr. Fowler said. “And they’re struggling.”

One potential solution is the Pasteur Act, a bipartisan bill reintroduced in Congress and supported by IDSA. The bill encourages pharmaceutical companies to develop new antimicrobial agents with funding not linked to sales or use of the drugs.

Furthermore, the bill emphasizes appropriate use of these agents through effective stewardship programs.

Although some institutions shifted resources away from AMR out of necessity when COVID-19 struck, “I can say certainly from our experience at Duke that at least stewardship was alive and well. It was not relegated to the side,” Dr. Fowler said.

“In fact,” he added, “if anything, COVID really emphasized the importance of stewardship” by helping clinicians with guidance on the use of remdesivir and other antivirals during the pandemic.

Also, in some instances, treatments used to keep people with COVID-19 alive can paradoxically place them at higher risk for other infections, Dr. Fowler said, citing corticosteroids as an example.
 

Everyone’s concern

AMR isn’t just an issue in hospital settings, either. Ms. Kinamon reiterated that she picked up the infection in an athletic environment.

“Antimicrobial resistance is not just a problem for ICU patients in the hospital. I was the healthiest I had ever been and just very nearly escaped death due to one of these infections,” she said. ”As rates of resistance rise as these pathogens become more virulent, AMR is becoming more and more of a community threat,” she added.

Furthermore, consumers are partially to blame as well, Dr. Fowler noted.

“It’s interesting when you look at the surveys of the numbers of patients that have used someone else’s antibiotics” or leftover antimicrobial agents from a prior infection.

“It’s really startling ... that’s the sort of antibiotic overuse that directly contributes to antibacterial resistance,” he said.
 

Reasons for optimism

Promising advances in diagnostics, treatment, and prevention of AMRs are underway, Dr. Fowler said.

“It always gets me really excited to talk about it. It’s amazing what technology and scientific discovery can bring to this discussion and to this threat,” he said.

For example, there is a “silent revolution” in diagnostics with the aim to rapidly provide life-saving actionable data on a real patient in nearly real time.

Traditionally, “you start off by treating what should be there” while awaiting results of tests to narrow down therapy, Dr. Fowler said. However, a whole host of new platforms are in development to reduce the time to susceptibility results. This kind of technology has “the potential to transform our ability to take care of patients, giving them the right drug at the right time and no more,” he said.

Another promising avenue of research involves bacteriophages. Dr. Fowler is principal investigator on a clinical trial underway to evaluate bacteriophages as adjunct therapy for MRSA bacteremia.

When it comes to prevention on AMR infections in the future, “I continue to be optimistic about the possibility of vaccines to prevent many of these infections,” Dr. Fowler said, adding that companies are working on vaccines against these kinds of infections caused by MRSA or Escherichia coli, for example.
 

Patient outcomes

The man in his 40s with the multidrug resistant Pseudomonas infections “is now to the point where he’s walking in the halls and I think he’ll get out of the hospital eventually,” Dr. Fowler said.

“But his life is forever changed,” he added.

Ms. Kinamon’s recovery from MRSA included time in the ICU, 1 month in a regular hospital setting, and 5 months at home.

“It sparked my interest in antibiotic research and development because I see myself as a direct beneficiary of the stockpile of antibiotics that were available to treat my infection,” Ms. Kinamon said. “Now as a medical student working with patients who have similar infections, I feel a deep empathy and connectedness to them because they ask the same questions that I did.”

A version of this article first appeared on WebMD.com.

The stark realities of antimicrobial resistance – including rising rates of difficult-to-treat infections, lack of a robust pipeline of future antimicrobials, and COVID-19 treatments that leave people more vulnerable to infections – remain urgent priorities, experts say.

For some patients, the pandemic and antimicrobial resistance (AMR) are intertwined.

“One patient I’m seeing now in service really underscores how the two interact,” Vance Fowler, MD, said during a June 30 media briefing sponsored by the Infectious Diseases Society of America (IDSA). A man in his mid-40s, married with a small child, developed COVID-19 in early January 2021. He was intubated, spent about 1 month in the ICU, and managed to survive.

“But since then he has been struck with a series of progressively more drug resistant bacteria,” said Dr. Fowler, professor of medicine at Duke University, Durham, N.C., and chair of the IDSA Antimicrobial Resistance Committee.

The patient acquired Pseudomonas ventilator-associated pneumonia. Although the infection initially responded to standard antibiotics, he has experienced relapses over the past few months. Through these multiple infections the Pseudomonas grew increasingly pan-resistant to treatment.

The only remaining antimicrobial agent for this patient, Dr. Fowler said, is “a case study in what we are describing ... a drug that is used relatively infrequently, that is fairly expensive, but for that particular patient is absolutely vital.”
 

A ‘terrifying’ personal experience

Tori Kinamon, a Duke University medical student and Food and Drug Administration antibacterial drug resistance fellow, joined Dr. Fowler at the IDSA briefing. She shared her personal journey of surviving a methicillin-resistant Staphylococcus aureus (MRSA) infection, one that sparked her interest in becoming a physician.

“I had a very frightening and unexpected confrontation with antimicrobial resistance when I was a freshman in college,” Ms. Kinamon said.

A few days after competing in a Division One gymnastics championship, she felt a gradual onset of pain in her left hamstring. The pain grew acutely worse and, within days, her leg become red, swollen, and painful to the touch.

Ms. Kinamon was admitted to the hospital for suspected cellulitis and put on intravenous antibiotics.

“However, my clinical condition continued to decline,” she recalled. “Imaging studies revealed a 15-cm abscess deep in my hamstring.”

The limb- and life-threatening infection left her wondering if she would come out of surgery with both legs.

“Ultimately, I had eight surgeries in 2 weeks,” she said.

“As a 19-year-old collegiate athlete, that’s terrifying. And I never imagined that something like that would happen to me – until it did,” said Ms. Kinamon, who is an NCAA infection prevention advocate.

When Ms. Kinamon’s kidneys could no longer tolerate vancomycin, she was switched to daptomycin.

“I reflect quite frequently on how having that one extra drug in the stockpile had a significant impact on my outcome,” she said.
 

Incentivizing new antimicrobial agents

A lack of new antimicrobials in development is not a new story.

“There’s been a chill that’s been sustained on the antibiotic development field. Most large pharmaceutical companies have left the area of anti-infectants and the bulk of research and development is now in small pharmaceutical companies,” Dr. Fowler said. “And they’re struggling.”

One potential solution is the Pasteur Act, a bipartisan bill reintroduced in Congress and supported by IDSA. The bill encourages pharmaceutical companies to develop new antimicrobial agents with funding not linked to sales or use of the drugs.

Furthermore, the bill emphasizes appropriate use of these agents through effective stewardship programs.

Although some institutions shifted resources away from AMR out of necessity when COVID-19 struck, “I can say certainly from our experience at Duke that at least stewardship was alive and well. It was not relegated to the side,” Dr. Fowler said.

“In fact,” he added, “if anything, COVID really emphasized the importance of stewardship” by helping clinicians with guidance on the use of remdesivir and other antivirals during the pandemic.

Also, in some instances, treatments used to keep people with COVID-19 alive can paradoxically place them at higher risk for other infections, Dr. Fowler said, citing corticosteroids as an example.
 

Everyone’s concern

AMR isn’t just an issue in hospital settings, either. Ms. Kinamon reiterated that she picked up the infection in an athletic environment.

“Antimicrobial resistance is not just a problem for ICU patients in the hospital. I was the healthiest I had ever been and just very nearly escaped death due to one of these infections,” she said. ”As rates of resistance rise as these pathogens become more virulent, AMR is becoming more and more of a community threat,” she added.

Furthermore, consumers are partially to blame as well, Dr. Fowler noted.

“It’s interesting when you look at the surveys of the numbers of patients that have used someone else’s antibiotics” or leftover antimicrobial agents from a prior infection.

“It’s really startling ... that’s the sort of antibiotic overuse that directly contributes to antibacterial resistance,” he said.
 

Reasons for optimism

Promising advances in diagnostics, treatment, and prevention of AMRs are underway, Dr. Fowler said.

“It always gets me really excited to talk about it. It’s amazing what technology and scientific discovery can bring to this discussion and to this threat,” he said.

For example, there is a “silent revolution” in diagnostics with the aim to rapidly provide life-saving actionable data on a real patient in nearly real time.

Traditionally, “you start off by treating what should be there” while awaiting results of tests to narrow down therapy, Dr. Fowler said. However, a whole host of new platforms are in development to reduce the time to susceptibility results. This kind of technology has “the potential to transform our ability to take care of patients, giving them the right drug at the right time and no more,” he said.

Another promising avenue of research involves bacteriophages. Dr. Fowler is principal investigator on a clinical trial underway to evaluate bacteriophages as adjunct therapy for MRSA bacteremia.

When it comes to prevention on AMR infections in the future, “I continue to be optimistic about the possibility of vaccines to prevent many of these infections,” Dr. Fowler said, adding that companies are working on vaccines against these kinds of infections caused by MRSA or Escherichia coli, for example.
 

Patient outcomes

The man in his 40s with the multidrug resistant Pseudomonas infections “is now to the point where he’s walking in the halls and I think he’ll get out of the hospital eventually,” Dr. Fowler said.

“But his life is forever changed,” he added.

Ms. Kinamon’s recovery from MRSA included time in the ICU, 1 month in a regular hospital setting, and 5 months at home.

“It sparked my interest in antibiotic research and development because I see myself as a direct beneficiary of the stockpile of antibiotics that were available to treat my infection,” Ms. Kinamon said. “Now as a medical student working with patients who have similar infections, I feel a deep empathy and connectedness to them because they ask the same questions that I did.”

A version of this article first appeared on WebMD.com.

The debate over tympanostomy tubes versus antibiotics for recurrent acute otitis media (AOM) in young children is long-standing. Now, results of a randomized controlled trial show that tubes do not significantly lower the rate of episodes, compared with antibiotics, and medical management doesn’t increase antibiotic resistance.

“We found no evidence of microbial resistance from treating with antibiotics. If there’s not an impact on resistance, why take unnecessary chances on complications of surgery?” lead author Alejandro Hoberman, MD, from Children’s Hospital of Pittsburgh, said in an interview.

The study by Dr. Hoberman and colleagues was published May 13 in the New England Journal of Medicine.

AOM is the most frequent condition diagnosed in children in the United States after the common cold, affecting five of six children younger than 3 years. It is the leading indication for antimicrobial treatment, and tympanostomy tube insertion is the most frequently performed pediatric operation after the newborn period.

Randomized controlled clinical trials were conducted in the 1980s, but by the 1990s, questions of overuse arose. The American Academy of Otolaryngology–Head and Neck Surgery Foundation published the first clinical practice guidelines in 2013.

Parents must weigh the pros and cons. The use of tubes may avoid or delay the next round of drugs, but tubes cost more and introduce small risks (anesthesia, refractory otorrhea, tube blockage, premature dislocation or extrusion, and mild conductive hearing loss).

“We addressed issues that plagued older studies – a longer-term follow-up of 2 years, validated diagnoses of infection to determine eligibility – and used rating scales to measure quality of life,” Dr. Hoberman said.

The researchers randomly assigned children to receive antibiotics or tubes. To be eligible, children had to be 6-35 months of age and have had at least three episodes of AOM within 6 months or at least four episodes within 12 months, including at least one within the preceding 6 months.

The primary outcome was the mean number of episodes of AOM per child-year. Children were assessed at 8-week intervals and within 48 hours of developing symptoms of ear infection. The medically treated children received oral amoxicillin or, if that was ineffective, intramuscular ceftriaxone.

Criteria for determining treatment failure included persistent otorrhea, tympanic membrane perforation, antibiotic-associated diarrhea, reaction to anesthesia, and recurrence of AOM at a frequency equal to the frequency before antibiotic treatment.

In comparing tympanostomy tubes with antibiotics, Dr. Hoberman said, “We were unable to show benefit in the rate of ear infections per child per year over a 2-year period.” As expected, the infection rate fell by about half from the first year to the second in all children.

Overall, the investigators found “no substantial differences between treatment groups” with regard to AOM frequency, percentage of severe episodes, extent of antimicrobial resistance, quality of life for the children, and parental stress.

In an intention-to-treat analysis, the rate of AOM episodes per child-year during the study was 1.48 ± 0.08 for tubes and 1.56 ± 0.08 for antibiotics (P = .66).

However, randomization was not maintained in the intention-to-treat arm. Ten percent (13 of 129) of the children slated to receive tubes didn’t get them because of parental request. Conversely, 16% (54 of 121) of children in the antibiotic group received tubes, 35 (29%) of them in accordance with the trial protocol because of frequent recurrences, and 19 (16%) at parental request.

In a per-protocol analysis, rates of AOM episodes per child-year were 1.47 ± 0.08 for tubes and 1.72 ± 0.11 for antibiotics.

Tubes were associated with longer time until the first ear infection post placement, at a median of 4.34 months, compared with 2.33 months for children who received antibiotics. A smaller percentage of children in the tube group had treatment failure than in the antibiotic group (45% vs. 62%). Children who received tubes also had fewer days per year with symptoms in comparison with the children in the antibiotic group (mean, 2.00 ± 0.29 days vs. 8.33 ± 0.59 days).

The frequency distribution of AOM episodes, the percentage of severe episodes, and antimicrobial resistance detected in respiratory specimens were the same for both groups.

“Hoberman and colleagues add to our knowledge of managing children with recurrent ear infections with a large and rigorous clinical trial showing comparable efficacy of tympanostomy tube insertion, with antibiotic eardrops for new infections versus watchful waiting, with intermittent oral antibiotics, if further ear infections occur,” said Richard M. Rosenfeld, MD, MPH, MBA, distinguished professor and chairman, department of otolaryngology, SUNY Downstate Medical Center, New York.

However, in an accompanying editorial, Ellen R. Wald, MD, from the University of Wisconsin, Madison, pointed out that the sample size was smaller than desired, owing to participants switching groups.

In addition, Dr. Rosenfeld, who was the lead author of the 2013 guidelines, said the study likely underestimates the impact of tubes “because about two-thirds of the children who received them did not have persistent middle-ear fluid at baseline and would not have been candidates for tubes based on the current national guideline on tube indications.”

“Both tubes and intermittent antibiotic therapy are effective for managing recurrent AOM, and parents of children with persistent middle-ear effusion should engage in shared decision-making with their physician to decide on the best management option,” said Dr. Rosenfeld. “When in doubt, watchful waiting is appropriate because many children with recurrent AOM do better over time.”

Dr. Hoberman owns stock in Kaizen Bioscience and holds patents on devices to diagnose and treat AOM. One coauthor consults for Merck. Dr. Wald and Dr. Rosenfeld report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The debate over tympanostomy tubes versus antibiotics for recurrent acute otitis media (AOM) in young children is long-standing. Now, results of a randomized controlled trial show that tubes do not significantly lower the rate of episodes, compared with antibiotics, and medical management doesn’t increase antibiotic resistance.

“We found no evidence of microbial resistance from treating with antibiotics. If there’s not an impact on resistance, why take unnecessary chances on complications of surgery?” lead author Alejandro Hoberman, MD, from Children’s Hospital of Pittsburgh, said in an interview.

The study by Dr. Hoberman and colleagues was published May 13 in the New England Journal of Medicine.

AOM is the most frequent condition diagnosed in children in the United States after the common cold, affecting five of six children younger than 3 years. It is the leading indication for antimicrobial treatment, and tympanostomy tube insertion is the most frequently performed pediatric operation after the newborn period.

Randomized controlled clinical trials were conducted in the 1980s, but by the 1990s, questions of overuse arose. The American Academy of Otolaryngology–Head and Neck Surgery Foundation published the first clinical practice guidelines in 2013.

Parents must weigh the pros and cons. The use of tubes may avoid or delay the next round of drugs, but tubes cost more and introduce small risks (anesthesia, refractory otorrhea, tube blockage, premature dislocation or extrusion, and mild conductive hearing loss).

“We addressed issues that plagued older studies – a longer-term follow-up of 2 years, validated diagnoses of infection to determine eligibility – and used rating scales to measure quality of life,” Dr. Hoberman said.

The researchers randomly assigned children to receive antibiotics or tubes. To be eligible, children had to be 6-35 months of age and have had at least three episodes of AOM within 6 months or at least four episodes within 12 months, including at least one within the preceding 6 months.

The primary outcome was the mean number of episodes of AOM per child-year. Children were assessed at 8-week intervals and within 48 hours of developing symptoms of ear infection. The medically treated children received oral amoxicillin or, if that was ineffective, intramuscular ceftriaxone.

Criteria for determining treatment failure included persistent otorrhea, tympanic membrane perforation, antibiotic-associated diarrhea, reaction to anesthesia, and recurrence of AOM at a frequency equal to the frequency before antibiotic treatment.

In comparing tympanostomy tubes with antibiotics, Dr. Hoberman said, “We were unable to show benefit in the rate of ear infections per child per year over a 2-year period.” As expected, the infection rate fell by about half from the first year to the second in all children.

Overall, the investigators found “no substantial differences between treatment groups” with regard to AOM frequency, percentage of severe episodes, extent of antimicrobial resistance, quality of life for the children, and parental stress.

In an intention-to-treat analysis, the rate of AOM episodes per child-year during the study was 1.48 ± 0.08 for tubes and 1.56 ± 0.08 for antibiotics (P = .66).

However, randomization was not maintained in the intention-to-treat arm. Ten percent (13 of 129) of the children slated to receive tubes didn’t get them because of parental request. Conversely, 16% (54 of 121) of children in the antibiotic group received tubes, 35 (29%) of them in accordance with the trial protocol because of frequent recurrences, and 19 (16%) at parental request.

In a per-protocol analysis, rates of AOM episodes per child-year were 1.47 ± 0.08 for tubes and 1.72 ± 0.11 for antibiotics.

Tubes were associated with longer time until the first ear infection post placement, at a median of 4.34 months, compared with 2.33 months for children who received antibiotics. A smaller percentage of children in the tube group had treatment failure than in the antibiotic group (45% vs. 62%). Children who received tubes also had fewer days per year with symptoms in comparison with the children in the antibiotic group (mean, 2.00 ± 0.29 days vs. 8.33 ± 0.59 days).

The frequency distribution of AOM episodes, the percentage of severe episodes, and antimicrobial resistance detected in respiratory specimens were the same for both groups.

“Hoberman and colleagues add to our knowledge of managing children with recurrent ear infections with a large and rigorous clinical trial showing comparable efficacy of tympanostomy tube insertion, with antibiotic eardrops for new infections versus watchful waiting, with intermittent oral antibiotics, if further ear infections occur,” said Richard M. Rosenfeld, MD, MPH, MBA, distinguished professor and chairman, department of otolaryngology, SUNY Downstate Medical Center, New York.

However, in an accompanying editorial, Ellen R. Wald, MD, from the University of Wisconsin, Madison, pointed out that the sample size was smaller than desired, owing to participants switching groups.

In addition, Dr. Rosenfeld, who was the lead author of the 2013 guidelines, said the study likely underestimates the impact of tubes “because about two-thirds of the children who received them did not have persistent middle-ear fluid at baseline and would not have been candidates for tubes based on the current national guideline on tube indications.”

“Both tubes and intermittent antibiotic therapy are effective for managing recurrent AOM, and parents of children with persistent middle-ear effusion should engage in shared decision-making with their physician to decide on the best management option,” said Dr. Rosenfeld. “When in doubt, watchful waiting is appropriate because many children with recurrent AOM do better over time.”

Dr. Hoberman owns stock in Kaizen Bioscience and holds patents on devices to diagnose and treat AOM. One coauthor consults for Merck. Dr. Wald and Dr. Rosenfeld report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

The debate over tympanostomy tubes versus antibiotics for recurrent acute otitis media (AOM) in young children is long-standing. Now, results of a randomized controlled trial show that tubes do not significantly lower the rate of episodes, compared with antibiotics, and medical management doesn’t increase antibiotic resistance.

“We found no evidence of microbial resistance from treating with antibiotics. If there’s not an impact on resistance, why take unnecessary chances on complications of surgery?” lead author Alejandro Hoberman, MD, from Children’s Hospital of Pittsburgh, said in an interview.

The study by Dr. Hoberman and colleagues was published May 13 in the New England Journal of Medicine.

AOM is the most frequent condition diagnosed in children in the United States after the common cold, affecting five of six children younger than 3 years. It is the leading indication for antimicrobial treatment, and tympanostomy tube insertion is the most frequently performed pediatric operation after the newborn period.

Randomized controlled clinical trials were conducted in the 1980s, but by the 1990s, questions of overuse arose. The American Academy of Otolaryngology–Head and Neck Surgery Foundation published the first clinical practice guidelines in 2013.

Parents must weigh the pros and cons. The use of tubes may avoid or delay the next round of drugs, but tubes cost more and introduce small risks (anesthesia, refractory otorrhea, tube blockage, premature dislocation or extrusion, and mild conductive hearing loss).

“We addressed issues that plagued older studies – a longer-term follow-up of 2 years, validated diagnoses of infection to determine eligibility – and used rating scales to measure quality of life,” Dr. Hoberman said.

The researchers randomly assigned children to receive antibiotics or tubes. To be eligible, children had to be 6-35 months of age and have had at least three episodes of AOM within 6 months or at least four episodes within 12 months, including at least one within the preceding 6 months.

The primary outcome was the mean number of episodes of AOM per child-year. Children were assessed at 8-week intervals and within 48 hours of developing symptoms of ear infection. The medically treated children received oral amoxicillin or, if that was ineffective, intramuscular ceftriaxone.

Criteria for determining treatment failure included persistent otorrhea, tympanic membrane perforation, antibiotic-associated diarrhea, reaction to anesthesia, and recurrence of AOM at a frequency equal to the frequency before antibiotic treatment.

In comparing tympanostomy tubes with antibiotics, Dr. Hoberman said, “We were unable to show benefit in the rate of ear infections per child per year over a 2-year period.” As expected, the infection rate fell by about half from the first year to the second in all children.

Overall, the investigators found “no substantial differences between treatment groups” with regard to AOM frequency, percentage of severe episodes, extent of antimicrobial resistance, quality of life for the children, and parental stress.

In an intention-to-treat analysis, the rate of AOM episodes per child-year during the study was 1.48 ± 0.08 for tubes and 1.56 ± 0.08 for antibiotics (P = .66).

However, randomization was not maintained in the intention-to-treat arm. Ten percent (13 of 129) of the children slated to receive tubes didn’t get them because of parental request. Conversely, 16% (54 of 121) of children in the antibiotic group received tubes, 35 (29%) of them in accordance with the trial protocol because of frequent recurrences, and 19 (16%) at parental request.

In a per-protocol analysis, rates of AOM episodes per child-year were 1.47 ± 0.08 for tubes and 1.72 ± 0.11 for antibiotics.

Tubes were associated with longer time until the first ear infection post placement, at a median of 4.34 months, compared with 2.33 months for children who received antibiotics. A smaller percentage of children in the tube group had treatment failure than in the antibiotic group (45% vs. 62%). Children who received tubes also had fewer days per year with symptoms in comparison with the children in the antibiotic group (mean, 2.00 ± 0.29 days vs. 8.33 ± 0.59 days).

The frequency distribution of AOM episodes, the percentage of severe episodes, and antimicrobial resistance detected in respiratory specimens were the same for both groups.

“Hoberman and colleagues add to our knowledge of managing children with recurrent ear infections with a large and rigorous clinical trial showing comparable efficacy of tympanostomy tube insertion, with antibiotic eardrops for new infections versus watchful waiting, with intermittent oral antibiotics, if further ear infections occur,” said Richard M. Rosenfeld, MD, MPH, MBA, distinguished professor and chairman, department of otolaryngology, SUNY Downstate Medical Center, New York.

However, in an accompanying editorial, Ellen R. Wald, MD, from the University of Wisconsin, Madison, pointed out that the sample size was smaller than desired, owing to participants switching groups.

In addition, Dr. Rosenfeld, who was the lead author of the 2013 guidelines, said the study likely underestimates the impact of tubes “because about two-thirds of the children who received them did not have persistent middle-ear fluid at baseline and would not have been candidates for tubes based on the current national guideline on tube indications.”

“Both tubes and intermittent antibiotic therapy are effective for managing recurrent AOM, and parents of children with persistent middle-ear effusion should engage in shared decision-making with their physician to decide on the best management option,” said Dr. Rosenfeld. “When in doubt, watchful waiting is appropriate because many children with recurrent AOM do better over time.”

Dr. Hoberman owns stock in Kaizen Bioscience and holds patents on devices to diagnose and treat AOM. One coauthor consults for Merck. Dr. Wald and Dr. Rosenfeld report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Selective use of antibiotics based on birth circumstances may reduce unnecessary antibiotic exposure for preterm infants at risk of early-onset sepsis, based on data from 340 preterm infants at a single center.

Preterm infants born because of preterm labor, premature rupture of membranes, and/or intraamniotic infection (IAI) are considered at increased risk for early-onset sepsis, and current management strategies include a blood culture and initiation of empirical antibiotics, said Kirtan Patel, MD, of Texas A&M University, Dallas, and colleagues in a poster (# 1720) presented at the Pediatric Academic Societies annual meeting.

However, this blanket approach “may increase the unnecessary early antibiotic exposure in preterm infants possibly leading to future adverse health outcomes,” and physicians are advised to review the risks and benefits, Dr. Patel said.

Data from previous studies suggest that preterm infants born as a result of preterm labor and/or premature rupture of membranes with adequate Group B Streptococcus (GBS) intrapartum antibiotic prophylaxis and no indication of IAI may be managed without empiric antibiotics because the early-onset sepsis risk in these infants is much lower than the ones born through IAI and inadequate GBS intrapartum antibiotic prophylaxis.

To better identify preterm birth circumstances in which antibiotics might be avoided, the researchers conducted a retrospective cohort study of preterm infants born at 28-34 weeks’ gestation during the period from Jan. 1, 2015, to Dec. 31, 2018. These infants were in the low-risk category of preterm birth because of preterm labor or premature rupture of membranes, with no IAI and adequate GBS intrapartum antibiotic prophylaxis, and no signs of cardiovascular or respiratory instability after birth. Of these, 157 (46.2%) received empiric antibiotics soon after birth and 183 infants (53.8%) did not receive empiric antibiotics.

The mean gestational age and birth weight were significantly lower in the empiric antibiotic group, but after correcting for these variables, the factors with the greatest influence on the initiation of antibiotics were maternal intrapartum antibiotic prophylaxis (odds ratio, 3.13); premature rupture of membranes (OR, 3.75); use of continuous positive airway pressure (CPAP) in the delivery room (OR, 1.84); CPAP on admission to the neonatal intensive care unit (OR, 1.94); drawing a blood culture (OR, 13.72); and a complete blood count with immature to total neutrophil ratio greater than 0.2 (OR, 3.84).

Three infants (2%) in the antibiotics group had culture-positive early-onset sepsis with Escherichia coli, compared with no infants in the no-antibiotics group. No differences in short-term hospital outcomes appeared between the two groups. The study was limited in part by the retrospective design and sample size, the researchers noted.

However, the results support a selective approach to antibiotics for preterm infants, taking various birth circumstances into account, they said.
 

Further risk factor identification could curb antibiotic use

In this study, empiric antibiotics were cast as a wide net to avoid missing serious infections in a few patients, said Tim Joos, MD, a Seattle-based clinician with a combination internal medicine/pediatrics practice, in an interview.

“It is interesting in this retrospective review of 340 preterm infants that the three newborns that did have serious bacterial infection were correctly given empiric antibiotics from the start,” Dr. Joos noted. “The authors were very effective at elucidating the possible factors that go into starting or not starting empiric antibiotics, although there may be other factors in the clinician’s judgment that are being missed. … More studies are needed on this topic,” Dr. Joos said. “Further research examining how the septic newborns differ from the nonseptic ones could help to even further narrow the use of empiric antibiotics,” he added.

The study received no outside funding. The researchers had no financial conflicts to disclose. Dr. Joos had no financial conflicts to disclose, but serves as a member of the Pediatric News Editorial Advisory Board.

Selective use of antibiotics based on birth circumstances may reduce unnecessary antibiotic exposure for preterm infants at risk of early-onset sepsis, based on data from 340 preterm infants at a single center.

Preterm infants born because of preterm labor, premature rupture of membranes, and/or intraamniotic infection (IAI) are considered at increased risk for early-onset sepsis, and current management strategies include a blood culture and initiation of empirical antibiotics, said Kirtan Patel, MD, of Texas A&M University, Dallas, and colleagues in a poster (# 1720) presented at the Pediatric Academic Societies annual meeting.

However, this blanket approach “may increase the unnecessary early antibiotic exposure in preterm infants possibly leading to future adverse health outcomes,” and physicians are advised to review the risks and benefits, Dr. Patel said.

Data from previous studies suggest that preterm infants born as a result of preterm labor and/or premature rupture of membranes with adequate Group B Streptococcus (GBS) intrapartum antibiotic prophylaxis and no indication of IAI may be managed without empiric antibiotics because the early-onset sepsis risk in these infants is much lower than the ones born through IAI and inadequate GBS intrapartum antibiotic prophylaxis.

To better identify preterm birth circumstances in which antibiotics might be avoided, the researchers conducted a retrospective cohort study of preterm infants born at 28-34 weeks’ gestation during the period from Jan. 1, 2015, to Dec. 31, 2018. These infants were in the low-risk category of preterm birth because of preterm labor or premature rupture of membranes, with no IAI and adequate GBS intrapartum antibiotic prophylaxis, and no signs of cardiovascular or respiratory instability after birth. Of these, 157 (46.2%) received empiric antibiotics soon after birth and 183 infants (53.8%) did not receive empiric antibiotics.

The mean gestational age and birth weight were significantly lower in the empiric antibiotic group, but after correcting for these variables, the factors with the greatest influence on the initiation of antibiotics were maternal intrapartum antibiotic prophylaxis (odds ratio, 3.13); premature rupture of membranes (OR, 3.75); use of continuous positive airway pressure (CPAP) in the delivery room (OR, 1.84); CPAP on admission to the neonatal intensive care unit (OR, 1.94); drawing a blood culture (OR, 13.72); and a complete blood count with immature to total neutrophil ratio greater than 0.2 (OR, 3.84).

Three infants (2%) in the antibiotics group had culture-positive early-onset sepsis with Escherichia coli, compared with no infants in the no-antibiotics group. No differences in short-term hospital outcomes appeared between the two groups. The study was limited in part by the retrospective design and sample size, the researchers noted.

However, the results support a selective approach to antibiotics for preterm infants, taking various birth circumstances into account, they said.
 

Further risk factor identification could curb antibiotic use

In this study, empiric antibiotics were cast as a wide net to avoid missing serious infections in a few patients, said Tim Joos, MD, a Seattle-based clinician with a combination internal medicine/pediatrics practice, in an interview.

“It is interesting in this retrospective review of 340 preterm infants that the three newborns that did have serious bacterial infection were correctly given empiric antibiotics from the start,” Dr. Joos noted. “The authors were very effective at elucidating the possible factors that go into starting or not starting empiric antibiotics, although there may be other factors in the clinician’s judgment that are being missed. … More studies are needed on this topic,” Dr. Joos said. “Further research examining how the septic newborns differ from the nonseptic ones could help to even further narrow the use of empiric antibiotics,” he added.

The study received no outside funding. The researchers had no financial conflicts to disclose. Dr. Joos had no financial conflicts to disclose, but serves as a member of the Pediatric News Editorial Advisory Board.

Selective use of antibiotics based on birth circumstances may reduce unnecessary antibiotic exposure for preterm infants at risk of early-onset sepsis, based on data from 340 preterm infants at a single center.

Preterm infants born because of preterm labor, premature rupture of membranes, and/or intraamniotic infection (IAI) are considered at increased risk for early-onset sepsis, and current management strategies include a blood culture and initiation of empirical antibiotics, said Kirtan Patel, MD, of Texas A&M University, Dallas, and colleagues in a poster (# 1720) presented at the Pediatric Academic Societies annual meeting.

However, this blanket approach “may increase the unnecessary early antibiotic exposure in preterm infants possibly leading to future adverse health outcomes,” and physicians are advised to review the risks and benefits, Dr. Patel said.

Data from previous studies suggest that preterm infants born as a result of preterm labor and/or premature rupture of membranes with adequate Group B Streptococcus (GBS) intrapartum antibiotic prophylaxis and no indication of IAI may be managed without empiric antibiotics because the early-onset sepsis risk in these infants is much lower than the ones born through IAI and inadequate GBS intrapartum antibiotic prophylaxis.

To better identify preterm birth circumstances in which antibiotics might be avoided, the researchers conducted a retrospective cohort study of preterm infants born at 28-34 weeks’ gestation during the period from Jan. 1, 2015, to Dec. 31, 2018. These infants were in the low-risk category of preterm birth because of preterm labor or premature rupture of membranes, with no IAI and adequate GBS intrapartum antibiotic prophylaxis, and no signs of cardiovascular or respiratory instability after birth. Of these, 157 (46.2%) received empiric antibiotics soon after birth and 183 infants (53.8%) did not receive empiric antibiotics.

The mean gestational age and birth weight were significantly lower in the empiric antibiotic group, but after correcting for these variables, the factors with the greatest influence on the initiation of antibiotics were maternal intrapartum antibiotic prophylaxis (odds ratio, 3.13); premature rupture of membranes (OR, 3.75); use of continuous positive airway pressure (CPAP) in the delivery room (OR, 1.84); CPAP on admission to the neonatal intensive care unit (OR, 1.94); drawing a blood culture (OR, 13.72); and a complete blood count with immature to total neutrophil ratio greater than 0.2 (OR, 3.84).

Three infants (2%) in the antibiotics group had culture-positive early-onset sepsis with Escherichia coli, compared with no infants in the no-antibiotics group. No differences in short-term hospital outcomes appeared between the two groups. The study was limited in part by the retrospective design and sample size, the researchers noted.

However, the results support a selective approach to antibiotics for preterm infants, taking various birth circumstances into account, they said.
 

Further risk factor identification could curb antibiotic use

In this study, empiric antibiotics were cast as a wide net to avoid missing serious infections in a few patients, said Tim Joos, MD, a Seattle-based clinician with a combination internal medicine/pediatrics practice, in an interview.

“It is interesting in this retrospective review of 340 preterm infants that the three newborns that did have serious bacterial infection were correctly given empiric antibiotics from the start,” Dr. Joos noted. “The authors were very effective at elucidating the possible factors that go into starting or not starting empiric antibiotics, although there may be other factors in the clinician’s judgment that are being missed. … More studies are needed on this topic,” Dr. Joos said. “Further research examining how the septic newborns differ from the nonseptic ones could help to even further narrow the use of empiric antibiotics,” he added.

The study received no outside funding. The researchers had no financial conflicts to disclose. Dr. Joos had no financial conflicts to disclose, but serves as a member of the Pediatric News Editorial Advisory Board.

“Antibiotic stewardship is never easy, and sometimes it is very difficult to differentiate what is going on with a patient in the clinical setting,” said Valerie M. Vaughn, MD, of the University of Utah, Salt Lake City, at SHM Converge, the annual conference of the Society of Hospital Medicine.

“We know from studies that 20% of hospitalized patients who receive an antibiotic have an adverse drug event from that antibiotic within 30 days,” said Dr. Vaughn.

Dr. Vaughn identified several practical ways in which hospitalists can reduce antibiotic overuse, including in the management of patients hospitalized with COVID-19.
 

Identify asymptomatic bacteriuria

One key area in which hospitalists can improve antibiotic stewardship is in recognizing asymptomatic bacteriuria and the harms associated with treatment, Dr. Vaughn said. For example, a common scenario for hospitalists might involve and 80-year-old woman with dementia, who can provide little in the way of history, and whose chest x-ray can’t rule out an underlying infection. This patient might have a positive urine culture, but no other signs of a urinary tract infection. “We know that asymptomatic bacteriuria is very common in hospitalized patients,” especially elderly women living in nursing home settings, she noted.

In cases of asymptomatic bacteriuria, data show that antibiotic treatment does not improve outcomes, and in fact may increase the risk of subsequent UTI, said Dr. Vaughn. Elderly patients also are at increased risk for developing antibiotic-related adverse events, especially Clostridioides difficile. Asymptomatic bacteriuria is any bacteria in the urine in the absence of signs or symptoms of a UTI, even if lab tests show pyuria, nitrates, and resistant bacteria. These lab results are often associated with inappropriate antibiotic use. “The laboratory tests can’t distinguish between asymptomatic bacteriuria and a UTI, only the symptoms can,” she emphasized.
 

Contain treatment of community-acquired pneumonia

Another practical point for reducing antibiotics in the hospital setting is to limit treatment of community-acquired pneumonia (CAP) to 5 days when possible. Duration matters because for many diseases, shorter durations of antibiotic treatments are just as effective as longer durations based on the latest evidence. “This is a change in dogma,” from previous thinking that patients must complete a full course, and that anything less might promote antibiotic resistance, she said.

“In fact, longer antibiotic durations kill off more healthy, normal flora, select for resistant pathogens, increase the risk of C. difficile, and increase the risk of side effects,” she said.

Ultimately, the right treatment duration for pneumonia depends on several factors including patient factors, disease, clinical stability, and rate of improvement. However, a good rule of thumb is that approximately 89% of CAP patients need only 5 days of antibiotics as long as they are afebrile for 48 hours and have 1 or fewer vital sign abnormalities by day 5 of treatment. “We do need to prescribe longer durations for patients with complications,” she emphasized.
 

Revisit need for antibiotics at discharge

Hospitalists also can practice antibiotic stewardship by considering four points at patient discharge, said Dr. Vaughn.

First, consider whether antibiotics can be stopped. For example, antibiotics are not needed on discharge if infection is no longer the most likely diagnosis, or if the course of antibiotics has been completed, as is often the case for patients hospitalized with CAP, she noted.

Second, if the antibiotics can’t be stopped at the time of discharge, consider whether the preferred agent is being used. Third, be sure the patient is receiving the minimum duration of antibiotics, and fourth, be sure that the dose, indication, and total planned duration with start and stop dates is written in the discharge summary, said Dr. Vaughn. “This helps with communication to our outpatient providers as well as with education to the patients themselves.”
 

Bacterial coinfections rare in COVID-19

Dr. Vaughn concluded the session with data from a study she conducted with colleagues on the use of empiric antibacterial therapy and community-onset bacterial coinfection in hospitalized COVID-19 patients. The study included 1,667 patients at 32 hospitals in Michigan. The number of patients treated with antibiotics varied widely among hospitals, from 30% to as much as 90%, Dr. Vaughn said.

“What we found was that more than half of hospitalized patients with COVID (57%) received empiric antibiotic therapy in the first few days of hospitalization,” she said.

However, “despite all the antibiotic use, community-onset bacterial coinfections were rare,” and occurred in only 3.5% of the patients, meaning that the number needed to treat with antibiotics to prevent a single case was about 20.

Predictors of community-onset co-infections in the patients included older age, more severe disease, patients coming from nursing homes, and those with lower BMI or kidney disease, said Dr. Vaughn. She and her team also found that procalcitonin’s positive predictive value was 9.3%, but the negative predictive value was 98.3%, so these patients were extremely likely to have no coinfection.

Dr. Vaughn said that in her practice she might order procalcitonin when considering stopping antibiotics in a patient with COVID-19 and make a decision based on the negative predictive value, but she emphasized that she does not use it in the converse situation to rely on a positive value when deciding whether to start antibiotics in these patients.

Dr. Vaughn had no financial conflicts to disclose.

“Antibiotic stewardship is never easy, and sometimes it is very difficult to differentiate what is going on with a patient in the clinical setting,” said Valerie M. Vaughn, MD, of the University of Utah, Salt Lake City, at SHM Converge, the annual conference of the Society of Hospital Medicine.

“We know from studies that 20% of hospitalized patients who receive an antibiotic have an adverse drug event from that antibiotic within 30 days,” said Dr. Vaughn.

Dr. Vaughn identified several practical ways in which hospitalists can reduce antibiotic overuse, including in the management of patients hospitalized with COVID-19.
 

Identify asymptomatic bacteriuria

One key area in which hospitalists can improve antibiotic stewardship is in recognizing asymptomatic bacteriuria and the harms associated with treatment, Dr. Vaughn said. For example, a common scenario for hospitalists might involve and 80-year-old woman with dementia, who can provide little in the way of history, and whose chest x-ray can’t rule out an underlying infection. This patient might have a positive urine culture, but no other signs of a urinary tract infection. “We know that asymptomatic bacteriuria is very common in hospitalized patients,” especially elderly women living in nursing home settings, she noted.

In cases of asymptomatic bacteriuria, data show that antibiotic treatment does not improve outcomes, and in fact may increase the risk of subsequent UTI, said Dr. Vaughn. Elderly patients also are at increased risk for developing antibiotic-related adverse events, especially Clostridioides difficile. Asymptomatic bacteriuria is any bacteria in the urine in the absence of signs or symptoms of a UTI, even if lab tests show pyuria, nitrates, and resistant bacteria. These lab results are often associated with inappropriate antibiotic use. “The laboratory tests can’t distinguish between asymptomatic bacteriuria and a UTI, only the symptoms can,” she emphasized.
 

Contain treatment of community-acquired pneumonia

Another practical point for reducing antibiotics in the hospital setting is to limit treatment of community-acquired pneumonia (CAP) to 5 days when possible. Duration matters because for many diseases, shorter durations of antibiotic treatments are just as effective as longer durations based on the latest evidence. “This is a change in dogma,” from previous thinking that patients must complete a full course, and that anything less might promote antibiotic resistance, she said.

“In fact, longer antibiotic durations kill off more healthy, normal flora, select for resistant pathogens, increase the risk of C. difficile, and increase the risk of side effects,” she said.

Ultimately, the right treatment duration for pneumonia depends on several factors including patient factors, disease, clinical stability, and rate of improvement. However, a good rule of thumb is that approximately 89% of CAP patients need only 5 days of antibiotics as long as they are afebrile for 48 hours and have 1 or fewer vital sign abnormalities by day 5 of treatment. “We do need to prescribe longer durations for patients with complications,” she emphasized.
 

Revisit need for antibiotics at discharge

Hospitalists also can practice antibiotic stewardship by considering four points at patient discharge, said Dr. Vaughn.

First, consider whether antibiotics can be stopped. For example, antibiotics are not needed on discharge if infection is no longer the most likely diagnosis, or if the course of antibiotics has been completed, as is often the case for patients hospitalized with CAP, she noted.

Second, if the antibiotics can’t be stopped at the time of discharge, consider whether the preferred agent is being used. Third, be sure the patient is receiving the minimum duration of antibiotics, and fourth, be sure that the dose, indication, and total planned duration with start and stop dates is written in the discharge summary, said Dr. Vaughn. “This helps with communication to our outpatient providers as well as with education to the patients themselves.”
 

Bacterial coinfections rare in COVID-19

Dr. Vaughn concluded the session with data from a study she conducted with colleagues on the use of empiric antibacterial therapy and community-onset bacterial coinfection in hospitalized COVID-19 patients. The study included 1,667 patients at 32 hospitals in Michigan. The number of patients treated with antibiotics varied widely among hospitals, from 30% to as much as 90%, Dr. Vaughn said.

“What we found was that more than half of hospitalized patients with COVID (57%) received empiric antibiotic therapy in the first few days of hospitalization,” she said.

However, “despite all the antibiotic use, community-onset bacterial coinfections were rare,” and occurred in only 3.5% of the patients, meaning that the number needed to treat with antibiotics to prevent a single case was about 20.

Predictors of community-onset co-infections in the patients included older age, more severe disease, patients coming from nursing homes, and those with lower BMI or kidney disease, said Dr. Vaughn. She and her team also found that procalcitonin’s positive predictive value was 9.3%, but the negative predictive value was 98.3%, so these patients were extremely likely to have no coinfection.

Dr. Vaughn said that in her practice she might order procalcitonin when considering stopping antibiotics in a patient with COVID-19 and make a decision based on the negative predictive value, but she emphasized that she does not use it in the converse situation to rely on a positive value when deciding whether to start antibiotics in these patients.

Dr. Vaughn had no financial conflicts to disclose.

“Antibiotic stewardship is never easy, and sometimes it is very difficult to differentiate what is going on with a patient in the clinical setting,” said Valerie M. Vaughn, MD, of the University of Utah, Salt Lake City, at SHM Converge, the annual conference of the Society of Hospital Medicine.

“We know from studies that 20% of hospitalized patients who receive an antibiotic have an adverse drug event from that antibiotic within 30 days,” said Dr. Vaughn.

Dr. Vaughn identified several practical ways in which hospitalists can reduce antibiotic overuse, including in the management of patients hospitalized with COVID-19.
 

Identify asymptomatic bacteriuria

One key area in which hospitalists can improve antibiotic stewardship is in recognizing asymptomatic bacteriuria and the harms associated with treatment, Dr. Vaughn said. For example, a common scenario for hospitalists might involve and 80-year-old woman with dementia, who can provide little in the way of history, and whose chest x-ray can’t rule out an underlying infection. This patient might have a positive urine culture, but no other signs of a urinary tract infection. “We know that asymptomatic bacteriuria is very common in hospitalized patients,” especially elderly women living in nursing home settings, she noted.

In cases of asymptomatic bacteriuria, data show that antibiotic treatment does not improve outcomes, and in fact may increase the risk of subsequent UTI, said Dr. Vaughn. Elderly patients also are at increased risk for developing antibiotic-related adverse events, especially Clostridioides difficile. Asymptomatic bacteriuria is any bacteria in the urine in the absence of signs or symptoms of a UTI, even if lab tests show pyuria, nitrates, and resistant bacteria. These lab results are often associated with inappropriate antibiotic use. “The laboratory tests can’t distinguish between asymptomatic bacteriuria and a UTI, only the symptoms can,” she emphasized.
 

Contain treatment of community-acquired pneumonia

Another practical point for reducing antibiotics in the hospital setting is to limit treatment of community-acquired pneumonia (CAP) to 5 days when possible. Duration matters because for many diseases, shorter durations of antibiotic treatments are just as effective as longer durations based on the latest evidence. “This is a change in dogma,” from previous thinking that patients must complete a full course, and that anything less might promote antibiotic resistance, she said.

“In fact, longer antibiotic durations kill off more healthy, normal flora, select for resistant pathogens, increase the risk of C. difficile, and increase the risk of side effects,” she said.

Ultimately, the right treatment duration for pneumonia depends on several factors including patient factors, disease, clinical stability, and rate of improvement. However, a good rule of thumb is that approximately 89% of CAP patients need only 5 days of antibiotics as long as they are afebrile for 48 hours and have 1 or fewer vital sign abnormalities by day 5 of treatment. “We do need to prescribe longer durations for patients with complications,” she emphasized.
 

Revisit need for antibiotics at discharge

Hospitalists also can practice antibiotic stewardship by considering four points at patient discharge, said Dr. Vaughn.

First, consider whether antibiotics can be stopped. For example, antibiotics are not needed on discharge if infection is no longer the most likely diagnosis, or if the course of antibiotics has been completed, as is often the case for patients hospitalized with CAP, she noted.

Second, if the antibiotics can’t be stopped at the time of discharge, consider whether the preferred agent is being used. Third, be sure the patient is receiving the minimum duration of antibiotics, and fourth, be sure that the dose, indication, and total planned duration with start and stop dates is written in the discharge summary, said Dr. Vaughn. “This helps with communication to our outpatient providers as well as with education to the patients themselves.”
 

Bacterial coinfections rare in COVID-19

Dr. Vaughn concluded the session with data from a study she conducted with colleagues on the use of empiric antibacterial therapy and community-onset bacterial coinfection in hospitalized COVID-19 patients. The study included 1,667 patients at 32 hospitals in Michigan. The number of patients treated with antibiotics varied widely among hospitals, from 30% to as much as 90%, Dr. Vaughn said.

“What we found was that more than half of hospitalized patients with COVID (57%) received empiric antibiotic therapy in the first few days of hospitalization,” she said.

However, “despite all the antibiotic use, community-onset bacterial coinfections were rare,” and occurred in only 3.5% of the patients, meaning that the number needed to treat with antibiotics to prevent a single case was about 20.

Predictors of community-onset co-infections in the patients included older age, more severe disease, patients coming from nursing homes, and those with lower BMI or kidney disease, said Dr. Vaughn. She and her team also found that procalcitonin’s positive predictive value was 9.3%, but the negative predictive value was 98.3%, so these patients were extremely likely to have no coinfection.

Dr. Vaughn said that in her practice she might order procalcitonin when considering stopping antibiotics in a patient with COVID-19 and make a decision based on the negative predictive value, but she emphasized that she does not use it in the converse situation to rely on a positive value when deciding whether to start antibiotics in these patients.

Dr. Vaughn had no financial conflicts to disclose.

Changing the continuous antibiotic prophylactic agent had no significant effect on the risk of a second infection in children with breakthrough urinary tract infections (UTIs), based on data from 62 children treated at a single center.

Continuous antibiotic prophylaxis (CAP) is often used for UTI prevention in children with febrile UTIs or anomalies that predispose them to UTIs, such as vesicoureteral reflux (VUR) or bladder and bowel dysfunction, said Lane M. Shish, MPH, of the University of Washington, Bothell, and colleagues in a poster (#1245) presented at the Pediatric Academic Societies annual meeting.

CAP, once initiated, is used until a planned endpoint or a breakthrough UTI, at which point alternative treatments usually include surgical intervention or a CAP agent change, the researchers said. However, changing the CAP agent is based on consensus without evidence of benefit, they noted.

To evaluate the potential effect of switching or maintaining CAP in cases of breakthrough UTIs, the researchers conducted a retrospective cohort study of all patients younger than 18 years on CAP for UTI prevention enrolled in a pediatric urology registry between January 2013 and August 2020.

All patients experienced a breakthrough UTI while on CAP; CAP was changed for 24 patients and left unchanged for 38 patients.

The primary outcome of second-breakthrough infections occurred in 12 of the changed CAP group and 22 of the unchanged group, with a relative risk of 0.86. The percentage of second breakthrough UTIs resistant to the current CAP was not significantly different between the changed and unchanged CAP groups (75% vs. 77%; P = 0.88).

The researchers also identified a rate ratio of 0.67 for a second breakthrough UTI in the changed CAP group, and found that approximately one-third of these patients (33.3%) developed antibiotic resistance to their initial antibiotic agent and the changed antibiotic agent.

The study findings were limited by several factors, including the retrospective design and small sample size, the researchers noted.

However, the results suggest that changing the CAP after an initial breakthrough UTI in children did not increase the risk of a second breakthrough UTI, and that CAP changing did introduce a risk of developing a second UTI with increased CAP resistance, the researchers noted. The results support leaving a child’s CAP unchanged after an initial breakthrough UTI, although additional research is needed to verify the findings, including studies involving a larger cohort with a multi-institutional prospective evaluation, they concluded.

Manage UTIs to reduce recurrence and resistance

“As we know, avoiding recurrent UTIs is important in preserving renal function in pediatric patients,” said Tim Joos, MD, a Seattle-based clinician with a combination internal medicine/pediatrics practice, in an interview.

“Avoiding recurrent UTIs is also important to avoid the development and spread of multidrug-resistant organisms,” he said.

Dr. Joos said he was surprised by some of the study findings. “I was surprised that, over the course of this 7-year retrospective review, overall only approximately 50% of patients with a first breakthrough UTI on CAP developed a second breakthrough UTI,” he noted. “Also, the relative risk of a second UTI was not significantly affected by whether the CAP antibiotic was changed after the first infection,” he said. “It would be interesting to see whether these results hold up in a randomized, prospective study,” he added.

The study received no outside funding. The researchers had no financial conflicts to disclose. Dr. Joos had no financial conflicts to disclose, but serves as a member of the Pediatric News Editorial Advisory Board.

Changing the continuous antibiotic prophylactic agent had no significant effect on the risk of a second infection in children with breakthrough urinary tract infections (UTIs), based on data from 62 children treated at a single center.

Continuous antibiotic prophylaxis (CAP) is often used for UTI prevention in children with febrile UTIs or anomalies that predispose them to UTIs, such as vesicoureteral reflux (VUR) or bladder and bowel dysfunction, said Lane M. Shish, MPH, of the University of Washington, Bothell, and colleagues in a poster (#1245) presented at the Pediatric Academic Societies annual meeting.

CAP, once initiated, is used until a planned endpoint or a breakthrough UTI, at which point alternative treatments usually include surgical intervention or a CAP agent change, the researchers said. However, changing the CAP agent is based on consensus without evidence of benefit, they noted.

To evaluate the potential effect of switching or maintaining CAP in cases of breakthrough UTIs, the researchers conducted a retrospective cohort study of all patients younger than 18 years on CAP for UTI prevention enrolled in a pediatric urology registry between January 2013 and August 2020.

All patients experienced a breakthrough UTI while on CAP; CAP was changed for 24 patients and left unchanged for 38 patients.

The primary outcome of second-breakthrough infections occurred in 12 of the changed CAP group and 22 of the unchanged group, with a relative risk of 0.86. The percentage of second breakthrough UTIs resistant to the current CAP was not significantly different between the changed and unchanged CAP groups (75% vs. 77%; P = 0.88).

The researchers also identified a rate ratio of 0.67 for a second breakthrough UTI in the changed CAP group, and found that approximately one-third of these patients (33.3%) developed antibiotic resistance to their initial antibiotic agent and the changed antibiotic agent.

The study findings were limited by several factors, including the retrospective design and small sample size, the researchers noted.

However, the results suggest that changing the CAP after an initial breakthrough UTI in children did not increase the risk of a second breakthrough UTI, and that CAP changing did introduce a risk of developing a second UTI with increased CAP resistance, the researchers noted. The results support leaving a child’s CAP unchanged after an initial breakthrough UTI, although additional research is needed to verify the findings, including studies involving a larger cohort with a multi-institutional prospective evaluation, they concluded.

Manage UTIs to reduce recurrence and resistance

“As we know, avoiding recurrent UTIs is important in preserving renal function in pediatric patients,” said Tim Joos, MD, a Seattle-based clinician with a combination internal medicine/pediatrics practice, in an interview.

“Avoiding recurrent UTIs is also important to avoid the development and spread of multidrug-resistant organisms,” he said.

Dr. Joos said he was surprised by some of the study findings. “I was surprised that, over the course of this 7-year retrospective review, overall only approximately 50% of patients with a first breakthrough UTI on CAP developed a second breakthrough UTI,” he noted. “Also, the relative risk of a second UTI was not significantly affected by whether the CAP antibiotic was changed after the first infection,” he said. “It would be interesting to see whether these results hold up in a randomized, prospective study,” he added.

The study received no outside funding. The researchers had no financial conflicts to disclose. Dr. Joos had no financial conflicts to disclose, but serves as a member of the Pediatric News Editorial Advisory Board.

Changing the continuous antibiotic prophylactic agent had no significant effect on the risk of a second infection in children with breakthrough urinary tract infections (UTIs), based on data from 62 children treated at a single center.

Continuous antibiotic prophylaxis (CAP) is often used for UTI prevention in children with febrile UTIs or anomalies that predispose them to UTIs, such as vesicoureteral reflux (VUR) or bladder and bowel dysfunction, said Lane M. Shish, MPH, of the University of Washington, Bothell, and colleagues in a poster (#1245) presented at the Pediatric Academic Societies annual meeting.

CAP, once initiated, is used until a planned endpoint or a breakthrough UTI, at which point alternative treatments usually include surgical intervention or a CAP agent change, the researchers said. However, changing the CAP agent is based on consensus without evidence of benefit, they noted.

To evaluate the potential effect of switching or maintaining CAP in cases of breakthrough UTIs, the researchers conducted a retrospective cohort study of all patients younger than 18 years on CAP for UTI prevention enrolled in a pediatric urology registry between January 2013 and August 2020.

All patients experienced a breakthrough UTI while on CAP; CAP was changed for 24 patients and left unchanged for 38 patients.

The primary outcome of second-breakthrough infections occurred in 12 of the changed CAP group and 22 of the unchanged group, with a relative risk of 0.86. The percentage of second breakthrough UTIs resistant to the current CAP was not significantly different between the changed and unchanged CAP groups (75% vs. 77%; P = 0.88).

The researchers also identified a rate ratio of 0.67 for a second breakthrough UTI in the changed CAP group, and found that approximately one-third of these patients (33.3%) developed antibiotic resistance to their initial antibiotic agent and the changed antibiotic agent.

The study findings were limited by several factors, including the retrospective design and small sample size, the researchers noted.

However, the results suggest that changing the CAP after an initial breakthrough UTI in children did not increase the risk of a second breakthrough UTI, and that CAP changing did introduce a risk of developing a second UTI with increased CAP resistance, the researchers noted. The results support leaving a child’s CAP unchanged after an initial breakthrough UTI, although additional research is needed to verify the findings, including studies involving a larger cohort with a multi-institutional prospective evaluation, they concluded.

Manage UTIs to reduce recurrence and resistance

“As we know, avoiding recurrent UTIs is important in preserving renal function in pediatric patients,” said Tim Joos, MD, a Seattle-based clinician with a combination internal medicine/pediatrics practice, in an interview.

“Avoiding recurrent UTIs is also important to avoid the development and spread of multidrug-resistant organisms,” he said.

Dr. Joos said he was surprised by some of the study findings. “I was surprised that, over the course of this 7-year retrospective review, overall only approximately 50% of patients with a first breakthrough UTI on CAP developed a second breakthrough UTI,” he noted. “Also, the relative risk of a second UTI was not significantly affected by whether the CAP antibiotic was changed after the first infection,” he said. “It would be interesting to see whether these results hold up in a randomized, prospective study,” he added.

The study received no outside funding. The researchers had no financial conflicts to disclose. Dr. Joos had no financial conflicts to disclose, but serves as a member of the Pediatric News Editorial Advisory Board.

Third-generation fluoroquinolones may not pose the same risk to tendon health as earlier-generation agents, the findings of a new study suggest.

If confirmed, this will be good news for patients who are allergic to beta-lactam antibiotics and others in whom fluoroquinolones are the antibiotics of choice because of their favorable pharmacokinetic properties and broad-spectrum activity, according to Dr. Takashi Chinen of Jichi Medical University in Tochigi, Japan, lead investigator of the new study, published in Annals of Family Medicine.

“This is especially notable for patients who are at increased risk for tendon disorders, such as athletes,” Dr. Chinen said in an interview.

To investigate the association between third-generation fluoroquinolones and tendinopathy, Dr. Chinen and colleagues conducted a self-controlled case series analysis using administrative claims data for a single prefecture in Japan, focusing specifically on the risk of Achilles tendon rupture.

From a database of 780,000 residents in the Kumamoto Prefecture enrolled in the country’s National Health Insurance and Elderly Health Insurance from April 2012 to March 2017, the investigators identified 504 patients who experienced Achilles tendon rupture during the 5-year period and were prescribed an antibiotic at some time during that period. They divided the observation period into antibiotic exposure (30 days from prescription) and nonexposure periods based on previous research linking this fluoroquinolone exposure window to an elevated risk of tendon injury. They classified antibiotics into fluoroquinolones and nonfluoroquinolones and further classified the fluoroquinolones by first, second, and third generation, including the following agents:

• First generation: Norfloxacin, nalidixic acid, pipemidic acid
• Second generation: Levofloxacin, tosufloxacin, ciprofloxacin, ofloxacin, lomefloxacin
• Third generation: Garenoxacin, sitafloxacin, prulifloxacin, moxifloxacin, pazufloxacin.

Tendon rupture risk varied based on fluoroquinolone class

Comparing the incidence of Achilles tendon rupture in the exposure period relative to the nonexposure period, the risk of rupture was not elevated during exposure to third-generation fluoroquinolones (incidence rate ratio, 1.05; 95% confidence interval, 0.33-3.37) and nonfluoroquinolones (IRR, 1.08; 95% CI, 0.80- 1.47). Contrasting with those findings, the researchers found that the risk of tendon rupture was significantly elevated during exposure to first- and second-generation fluoroquinolones (IRR, 2.94; 95% CI, 1.90-4.54). Similar findings were observed in subgroup analyses by gender and recent corticosteroid use, the authors wrote.

The increased risk associated with exposure to first- and second-generation fluoroquinolones is consistent with the elevated risk observed in previous studies, the majority of which focused on first- and second-generation agents, the authors noted.

“Our study is the first to investigate the risk of Achilles tendon rupture associated with third-generation fluoroquinolones by self-controlled case series analysis and using a large administrative claims database,” they said.

Because the study is based on administrative claims data, it does not support conclusions about differential risks.

“Some preclinical studies suggest that structural differences [in the drugs] may affect the risks,” Dr. Chinen said. In particular, one preclinical study linked methylpiperazinyl substituent with increased risk of tendon injury, and this substituent is more common in first- and second-generation fluoroquinolones.

Outside experts were unable to draw conclusions

The accuracy of the current study is “extremely limited” by its design, according to Dr. Karsten Knobloch, a sports medicine physician in private practice in Hanover, Germany, who has reported on the risk of drug-induced tendon disorders.

“This is a case series only, which is a very strict limitation; therefore, the ability to generalize the data is also very limited,” he said in an interview. “In my view, the study does not add substantial data to support that third-generation [fluoroquinolones] are safer than the prior ones.”

Thomas Lodise, PharmD, PhD, who is a professor at the Albany College of Pharmacy and Health Sciences in New York, pointed out another barrier to determining the value of the new research .

“Without knowing how many received moxifloxacin and descriptors of patients at baseline by each drug, it is hard to draw any definitive results from the paper,” Dr. Lodise noted.

Study design and execution had limitations

The authors acknowledged the limitations in the study design and execution. In particular, reliance on an administrative claims database means that the accuracy of diagnoses cannot be validated. Further, the study sample size may not have been sufficient to estimate the rupture risk for individual fluoroquinolones, they wrote.

Despite these and additional limitations, the findings have merit, according to the authors, who noted that the information may be useful in personalizing antibiotic therapy for individual patients.

“Fluoroquinolone-induced tendon injury is a rare event, and managing risk for even rare adverse events depends on each case,” Dr. Chinen explained. The findings of this study together with previous studies indicate that third-generation fluoroquinolones may be a safer option with respect to risk of Achilles tendon rupture for some patients who can’t be prescribed beta-lactam antibiotics and for some conditions, such as Legionella pneumophila, he said.

To increase internal and external validity of the results, further research including prospective cohort studies in broader populations are necessary, Dr. Chinen stressed.

The authors, Dr. Lodise, and Dr. Knobloch, who is owner of SportPraxis in Hanover, Germany, reported no conflicts.

Third-generation fluoroquinolones may not pose the same risk to tendon health as earlier-generation agents, the findings of a new study suggest.

If confirmed, this will be good news for patients who are allergic to beta-lactam antibiotics and others in whom fluoroquinolones are the antibiotics of choice because of their favorable pharmacokinetic properties and broad-spectrum activity, according to Dr. Takashi Chinen of Jichi Medical University in Tochigi, Japan, lead investigator of the new study, published in Annals of Family Medicine.

“This is especially notable for patients who are at increased risk for tendon disorders, such as athletes,” Dr. Chinen said in an interview.

To investigate the association between third-generation fluoroquinolones and tendinopathy, Dr. Chinen and colleagues conducted a self-controlled case series analysis using administrative claims data for a single prefecture in Japan, focusing specifically on the risk of Achilles tendon rupture.

From a database of 780,000 residents in the Kumamoto Prefecture enrolled in the country’s National Health Insurance and Elderly Health Insurance from April 2012 to March 2017, the investigators identified 504 patients who experienced Achilles tendon rupture during the 5-year period and were prescribed an antibiotic at some time during that period. They divided the observation period into antibiotic exposure (30 days from prescription) and nonexposure periods based on previous research linking this fluoroquinolone exposure window to an elevated risk of tendon injury. They classified antibiotics into fluoroquinolones and nonfluoroquinolones and further classified the fluoroquinolones by first, second, and third generation, including the following agents:

• First generation: Norfloxacin, nalidixic acid, pipemidic acid
• Second generation: Levofloxacin, tosufloxacin, ciprofloxacin, ofloxacin, lomefloxacin
• Third generation: Garenoxacin, sitafloxacin, prulifloxacin, moxifloxacin, pazufloxacin.

Tendon rupture risk varied based on fluoroquinolone class

Comparing the incidence of Achilles tendon rupture in the exposure period relative to the nonexposure period, the risk of rupture was not elevated during exposure to third-generation fluoroquinolones (incidence rate ratio, 1.05; 95% confidence interval, 0.33-3.37) and nonfluoroquinolones (IRR, 1.08; 95% CI, 0.80- 1.47). Contrasting with those findings, the researchers found that the risk of tendon rupture was significantly elevated during exposure to first- and second-generation fluoroquinolones (IRR, 2.94; 95% CI, 1.90-4.54). Similar findings were observed in subgroup analyses by gender and recent corticosteroid use, the authors wrote.

The increased risk associated with exposure to first- and second-generation fluoroquinolones is consistent with the elevated risk observed in previous studies, the majority of which focused on first- and second-generation agents, the authors noted.

“Our study is the first to investigate the risk of Achilles tendon rupture associated with third-generation fluoroquinolones by self-controlled case series analysis and using a large administrative claims database,” they said.

Because the study is based on administrative claims data, it does not support conclusions about differential risks.

“Some preclinical studies suggest that structural differences [in the drugs] may affect the risks,” Dr. Chinen said. In particular, one preclinical study linked methylpiperazinyl substituent with increased risk of tendon injury, and this substituent is more common in first- and second-generation fluoroquinolones.

Outside experts were unable to draw conclusions

The accuracy of the current study is “extremely limited” by its design, according to Dr. Karsten Knobloch, a sports medicine physician in private practice in Hanover, Germany, who has reported on the risk of drug-induced tendon disorders.

“This is a case series only, which is a very strict limitation; therefore, the ability to generalize the data is also very limited,” he said in an interview. “In my view, the study does not add substantial data to support that third-generation [fluoroquinolones] are safer than the prior ones.”

Thomas Lodise, PharmD, PhD, who is a professor at the Albany College of Pharmacy and Health Sciences in New York, pointed out another barrier to determining the value of the new research .

“Without knowing how many received moxifloxacin and descriptors of patients at baseline by each drug, it is hard to draw any definitive results from the paper,” Dr. Lodise noted.

Study design and execution had limitations

The authors acknowledged the limitations in the study design and execution. In particular, reliance on an administrative claims database means that the accuracy of diagnoses cannot be validated. Further, the study sample size may not have been sufficient to estimate the rupture risk for individual fluoroquinolones, they wrote.

Despite these and additional limitations, the findings have merit, according to the authors, who noted that the information may be useful in personalizing antibiotic therapy for individual patients.

“Fluoroquinolone-induced tendon injury is a rare event, and managing risk for even rare adverse events depends on each case,” Dr. Chinen explained. The findings of this study together with previous studies indicate that third-generation fluoroquinolones may be a safer option with respect to risk of Achilles tendon rupture for some patients who can’t be prescribed beta-lactam antibiotics and for some conditions, such as Legionella pneumophila, he said.

To increase internal and external validity of the results, further research including prospective cohort studies in broader populations are necessary, Dr. Chinen stressed.

The authors, Dr. Lodise, and Dr. Knobloch, who is owner of SportPraxis in Hanover, Germany, reported no conflicts.

Third-generation fluoroquinolones may not pose the same risk to tendon health as earlier-generation agents, the findings of a new study suggest.

If confirmed, this will be good news for patients who are allergic to beta-lactam antibiotics and others in whom fluoroquinolones are the antibiotics of choice because of their favorable pharmacokinetic properties and broad-spectrum activity, according to Dr. Takashi Chinen of Jichi Medical University in Tochigi, Japan, lead investigator of the new study, published in Annals of Family Medicine.

“This is especially notable for patients who are at increased risk for tendon disorders, such as athletes,” Dr. Chinen said in an interview.

To investigate the association between third-generation fluoroquinolones and tendinopathy, Dr. Chinen and colleagues conducted a self-controlled case series analysis using administrative claims data for a single prefecture in Japan, focusing specifically on the risk of Achilles tendon rupture.

From a database of 780,000 residents in the Kumamoto Prefecture enrolled in the country’s National Health Insurance and Elderly Health Insurance from April 2012 to March 2017, the investigators identified 504 patients who experienced Achilles tendon rupture during the 5-year period and were prescribed an antibiotic at some time during that period. They divided the observation period into antibiotic exposure (30 days from prescription) and nonexposure periods based on previous research linking this fluoroquinolone exposure window to an elevated risk of tendon injury. They classified antibiotics into fluoroquinolones and nonfluoroquinolones and further classified the fluoroquinolones by first, second, and third generation, including the following agents:

• First generation: Norfloxacin, nalidixic acid, pipemidic acid
• Second generation: Levofloxacin, tosufloxacin, ciprofloxacin, ofloxacin, lomefloxacin
• Third generation: Garenoxacin, sitafloxacin, prulifloxacin, moxifloxacin, pazufloxacin.

Tendon rupture risk varied based on fluoroquinolone class

Comparing the incidence of Achilles tendon rupture in the exposure period relative to the nonexposure period, the risk of rupture was not elevated during exposure to third-generation fluoroquinolones (incidence rate ratio, 1.05; 95% confidence interval, 0.33-3.37) and nonfluoroquinolones (IRR, 1.08; 95% CI, 0.80- 1.47). Contrasting with those findings, the researchers found that the risk of tendon rupture was significantly elevated during exposure to first- and second-generation fluoroquinolones (IRR, 2.94; 95% CI, 1.90-4.54). Similar findings were observed in subgroup analyses by gender and recent corticosteroid use, the authors wrote.

The increased risk associated with exposure to first- and second-generation fluoroquinolones is consistent with the elevated risk observed in previous studies, the majority of which focused on first- and second-generation agents, the authors noted.

“Our study is the first to investigate the risk of Achilles tendon rupture associated with third-generation fluoroquinolones by self-controlled case series analysis and using a large administrative claims database,” they said.

Because the study is based on administrative claims data, it does not support conclusions about differential risks.

“Some preclinical studies suggest that structural differences [in the drugs] may affect the risks,” Dr. Chinen said. In particular, one preclinical study linked methylpiperazinyl substituent with increased risk of tendon injury, and this substituent is more common in first- and second-generation fluoroquinolones.

Outside experts were unable to draw conclusions

The accuracy of the current study is “extremely limited” by its design, according to Dr. Karsten Knobloch, a sports medicine physician in private practice in Hanover, Germany, who has reported on the risk of drug-induced tendon disorders.

“This is a case series only, which is a very strict limitation; therefore, the ability to generalize the data is also very limited,” he said in an interview. “In my view, the study does not add substantial data to support that third-generation [fluoroquinolones] are safer than the prior ones.”

Thomas Lodise, PharmD, PhD, who is a professor at the Albany College of Pharmacy and Health Sciences in New York, pointed out another barrier to determining the value of the new research .

“Without knowing how many received moxifloxacin and descriptors of patients at baseline by each drug, it is hard to draw any definitive results from the paper,” Dr. Lodise noted.

Study design and execution had limitations

The authors acknowledged the limitations in the study design and execution. In particular, reliance on an administrative claims database means that the accuracy of diagnoses cannot be validated. Further, the study sample size may not have been sufficient to estimate the rupture risk for individual fluoroquinolones, they wrote.

Despite these and additional limitations, the findings have merit, according to the authors, who noted that the information may be useful in personalizing antibiotic therapy for individual patients.

“Fluoroquinolone-induced tendon injury is a rare event, and managing risk for even rare adverse events depends on each case,” Dr. Chinen explained. The findings of this study together with previous studies indicate that third-generation fluoroquinolones may be a safer option with respect to risk of Achilles tendon rupture for some patients who can’t be prescribed beta-lactam antibiotics and for some conditions, such as Legionella pneumophila, he said.

To increase internal and external validity of the results, further research including prospective cohort studies in broader populations are necessary, Dr. Chinen stressed.

The authors, Dr. Lodise, and Dr. Knobloch, who is owner of SportPraxis in Hanover, Germany, reported no conflicts.

A new study shows disturbing evidence that malaria is becoming resistant to artemisinin, a drug critical for treatment in Africa. Although artemisinin resistance has long plagued the Mekong Delta, it is relatively new to Africa.
 

In a study published online April 14 in The Lancet Infectious Diseases, researchers found that the typical 3-day course of treatment did not totally eradicate Plasmodium falciparum, the parasite that causes malaria. A delayed clearance of the parasite was shown and found to be associated with a genetic mutation called Pfkelch13 R561H.

P. falciparum isolates with this mutation were found in 7.5% of infected children in one area of Rwanda. Further genomic studies showed that this mutation was locally acquired and did not emerge from Southeast Asia. This is well illustrated in a genomic tree published in Nature Medicine in August, 2020. That study reported data collected from adults from 2013 to 2015.

The delay in reporting the mutation was due, in part, to the burdensome process of whole-genome sequencing and transfection studies, Pascal Ringwald, MD, PhD, coordinator of the Global Malaria Programme at WHO, and coauthor of the Nature Medicine study, said in an interview. In transfection studies, the mutation is inserted into parasites and the resultant effect is observed.

Aline Uwimana, MD, of Rwanda Biomedical Centre. is the lead author on both studies.

Meera Venkatesan, PhD, chief of the Case Management, Monitoring and Evaluation Branch, President’s Malaria Initiative, USAID, noted that the Lancet Infectious Diseases study was a therapeutic efficacy study (TES) on samples from children from 2018. In an interview, Dr. Venkatesan explained that the study is noteworthy because it demonstrated the clinical significance of this mutation with delayed parasite clearance. She did note that although there was a lag in publication of the initial reports of artemisinin resistance mutations, that information – and its implications – was promptly shared with the global malaria research community, as are other findings of public health importance.

Although most of the children got better, this “partial resistance” emerged while patients were taking artemether–lumefantrine. This is a type of artemisinin-based combination therapy (ACT) with two drugs intended to stall the emergence of resistance.

The delayed clearance will be a problem because it can contribute to the selection and spread of the partially resistant malaria parasite.

To slow the spread of artemisinin resistance, Dr. Ringwald emphasized the need to add a gametocidal drug to block the transmission to humans. “You give a single dose of primaquine, which will help stop the spread,” he said in an interview. “Continuing surveillance and mapping. These are priorities.”

So are following national guidelines and banning the use of artemisinin monotherapy. Dr. Ringwald stressed two additional priorities: the need for accurate diagnosis of malaria, and the need to use “good-quality drugs and to avoid substandard or fake medicines” by not purchasing drugs on the street.

Unscrupulous individuals are also selling artemisia preparations to treat or prevent COVID-19, when it has no such activity. Similarly, artemisia teas are sold as herbal remedies and nutraceuticals.

Philippe Guérin, MD, director of the Worldwide Antimalarial Resistance Network (WWARN), listed the same recommendations, focusing a bit more on accurate detection of malaria and treatment with a multidrug regimen plus primaquine. You need “to have different first-line treatment (different ACTs) to avoid drug pressure” and resistance to the partner drug emerging, he said in an interview.

Such multiple first-line treatments rely on artemisinin in combination with various drugs, but this can cause some logistical challenges. Resistance is so problematic that the MORU (Mahidol Oxford Tropical Medicine Research Unit) Tropical Health Network in Bangkok is studying triple drug combinations, adding amodiaquine or mefloquine to an artemisinin-based combination.

Dr. Guérin emphasized two other problems regarding the monitoring of malaria resistance in Africa (although not specifically Rwanda). One is the inability to do adequate surveillance in active conflict zones and areas of instability. The other is that COVID-19 is causing resources to be taken away from malaria and redirected to the more immediate crisis. By having to focus on the immediate viral pandemic, public-health authorities are missing the chance to address other critically important infectious diseases with large burdens – specifically malaria, TB, and HIV – which might have greater impacts on future generations.

Dr. Guérin noted that although we now have solid evidence of artemisinin resistance in Rwanda, and isolated cases in other African countries, we have little idea of the magnitude of the problem because testing is not widespread throughout parts of the continent.

What would widespread P. falciparum malaria resistance in Africa mean? Children are the most vulnerable to malaria, and account for two-thirds of the deaths. One study suggests there could be 78 million more cases over a 5-year period, along with far more deaths. Hence, there is a heightened urgency to implement the outlined strategies to prevent a looming catastrophe.

The authors have disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

A new study shows disturbing evidence that malaria is becoming resistant to artemisinin, a drug critical for treatment in Africa. Although artemisinin resistance has long plagued the Mekong Delta, it is relatively new to Africa.
 

In a study published online April 14 in The Lancet Infectious Diseases, researchers found that the typical 3-day course of treatment did not totally eradicate Plasmodium falciparum, the parasite that causes malaria. A delayed clearance of the parasite was shown and found to be associated with a genetic mutation called Pfkelch13 R561H.

P. falciparum isolates with this mutation were found in 7.5% of infected children in one area of Rwanda. Further genomic studies showed that this mutation was locally acquired and did not emerge from Southeast Asia. This is well illustrated in a genomic tree published in Nature Medicine in August, 2020. That study reported data collected from adults from 2013 to 2015.

The delay in reporting the mutation was due, in part, to the burdensome process of whole-genome sequencing and transfection studies, Pascal Ringwald, MD, PhD, coordinator of the Global Malaria Programme at WHO, and coauthor of the Nature Medicine study, said in an interview. In transfection studies, the mutation is inserted into parasites and the resultant effect is observed.

Aline Uwimana, MD, of Rwanda Biomedical Centre. is the lead author on both studies.

Meera Venkatesan, PhD, chief of the Case Management, Monitoring and Evaluation Branch, President’s Malaria Initiative, USAID, noted that the Lancet Infectious Diseases study was a therapeutic efficacy study (TES) on samples from children from 2018. In an interview, Dr. Venkatesan explained that the study is noteworthy because it demonstrated the clinical significance of this mutation with delayed parasite clearance. She did note that although there was a lag in publication of the initial reports of artemisinin resistance mutations, that information – and its implications – was promptly shared with the global malaria research community, as are other findings of public health importance.

Although most of the children got better, this “partial resistance” emerged while patients were taking artemether–lumefantrine. This is a type of artemisinin-based combination therapy (ACT) with two drugs intended to stall the emergence of resistance.

The delayed clearance will be a problem because it can contribute to the selection and spread of the partially resistant malaria parasite.

To slow the spread of artemisinin resistance, Dr. Ringwald emphasized the need to add a gametocidal drug to block the transmission to humans. “You give a single dose of primaquine, which will help stop the spread,” he said in an interview. “Continuing surveillance and mapping. These are priorities.”

So are following national guidelines and banning the use of artemisinin monotherapy. Dr. Ringwald stressed two additional priorities: the need for accurate diagnosis of malaria, and the need to use “good-quality drugs and to avoid substandard or fake medicines” by not purchasing drugs on the street.

Unscrupulous individuals are also selling artemisia preparations to treat or prevent COVID-19, when it has no such activity. Similarly, artemisia teas are sold as herbal remedies and nutraceuticals.

Philippe Guérin, MD, director of the Worldwide Antimalarial Resistance Network (WWARN), listed the same recommendations, focusing a bit more on accurate detection of malaria and treatment with a multidrug regimen plus primaquine. You need “to have different first-line treatment (different ACTs) to avoid drug pressure” and resistance to the partner drug emerging, he said in an interview.

Such multiple first-line treatments rely on artemisinin in combination with various drugs, but this can cause some logistical challenges. Resistance is so problematic that the MORU (Mahidol Oxford Tropical Medicine Research Unit) Tropical Health Network in Bangkok is studying triple drug combinations, adding amodiaquine or mefloquine to an artemisinin-based combination.

Dr. Guérin emphasized two other problems regarding the monitoring of malaria resistance in Africa (although not specifically Rwanda). One is the inability to do adequate surveillance in active conflict zones and areas of instability. The other is that COVID-19 is causing resources to be taken away from malaria and redirected to the more immediate crisis. By having to focus on the immediate viral pandemic, public-health authorities are missing the chance to address other critically important infectious diseases with large burdens – specifically malaria, TB, and HIV – which might have greater impacts on future generations.

Dr. Guérin noted that although we now have solid evidence of artemisinin resistance in Rwanda, and isolated cases in other African countries, we have little idea of the magnitude of the problem because testing is not widespread throughout parts of the continent.

What would widespread P. falciparum malaria resistance in Africa mean? Children are the most vulnerable to malaria, and account for two-thirds of the deaths. One study suggests there could be 78 million more cases over a 5-year period, along with far more deaths. Hence, there is a heightened urgency to implement the outlined strategies to prevent a looming catastrophe.

The authors have disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

A new study shows disturbing evidence that malaria is becoming resistant to artemisinin, a drug critical for treatment in Africa. Although artemisinin resistance has long plagued the Mekong Delta, it is relatively new to Africa.
 

In a study published online April 14 in The Lancet Infectious Diseases, researchers found that the typical 3-day course of treatment did not totally eradicate Plasmodium falciparum, the parasite that causes malaria. A delayed clearance of the parasite was shown and found to be associated with a genetic mutation called Pfkelch13 R561H.

P. falciparum isolates with this mutation were found in 7.5% of infected children in one area of Rwanda. Further genomic studies showed that this mutation was locally acquired and did not emerge from Southeast Asia. This is well illustrated in a genomic tree published in Nature Medicine in August, 2020. That study reported data collected from adults from 2013 to 2015.

The delay in reporting the mutation was due, in part, to the burdensome process of whole-genome sequencing and transfection studies, Pascal Ringwald, MD, PhD, coordinator of the Global Malaria Programme at WHO, and coauthor of the Nature Medicine study, said in an interview. In transfection studies, the mutation is inserted into parasites and the resultant effect is observed.

Aline Uwimana, MD, of Rwanda Biomedical Centre. is the lead author on both studies.

Meera Venkatesan, PhD, chief of the Case Management, Monitoring and Evaluation Branch, President’s Malaria Initiative, USAID, noted that the Lancet Infectious Diseases study was a therapeutic efficacy study (TES) on samples from children from 2018. In an interview, Dr. Venkatesan explained that the study is noteworthy because it demonstrated the clinical significance of this mutation with delayed parasite clearance. She did note that although there was a lag in publication of the initial reports of artemisinin resistance mutations, that information – and its implications – was promptly shared with the global malaria research community, as are other findings of public health importance.

Although most of the children got better, this “partial resistance” emerged while patients were taking artemether–lumefantrine. This is a type of artemisinin-based combination therapy (ACT) with two drugs intended to stall the emergence of resistance.

The delayed clearance will be a problem because it can contribute to the selection and spread of the partially resistant malaria parasite.

To slow the spread of artemisinin resistance, Dr. Ringwald emphasized the need to add a gametocidal drug to block the transmission to humans. “You give a single dose of primaquine, which will help stop the spread,” he said in an interview. “Continuing surveillance and mapping. These are priorities.”

So are following national guidelines and banning the use of artemisinin monotherapy. Dr. Ringwald stressed two additional priorities: the need for accurate diagnosis of malaria, and the need to use “good-quality drugs and to avoid substandard or fake medicines” by not purchasing drugs on the street.

Unscrupulous individuals are also selling artemisia preparations to treat or prevent COVID-19, when it has no such activity. Similarly, artemisia teas are sold as herbal remedies and nutraceuticals.

Philippe Guérin, MD, director of the Worldwide Antimalarial Resistance Network (WWARN), listed the same recommendations, focusing a bit more on accurate detection of malaria and treatment with a multidrug regimen plus primaquine. You need “to have different first-line treatment (different ACTs) to avoid drug pressure” and resistance to the partner drug emerging, he said in an interview.

Such multiple first-line treatments rely on artemisinin in combination with various drugs, but this can cause some logistical challenges. Resistance is so problematic that the MORU (Mahidol Oxford Tropical Medicine Research Unit) Tropical Health Network in Bangkok is studying triple drug combinations, adding amodiaquine or mefloquine to an artemisinin-based combination.

Dr. Guérin emphasized two other problems regarding the monitoring of malaria resistance in Africa (although not specifically Rwanda). One is the inability to do adequate surveillance in active conflict zones and areas of instability. The other is that COVID-19 is causing resources to be taken away from malaria and redirected to the more immediate crisis. By having to focus on the immediate viral pandemic, public-health authorities are missing the chance to address other critically important infectious diseases with large burdens – specifically malaria, TB, and HIV – which might have greater impacts on future generations.

Dr. Guérin noted that although we now have solid evidence of artemisinin resistance in Rwanda, and isolated cases in other African countries, we have little idea of the magnitude of the problem because testing is not widespread throughout parts of the continent.

What would widespread P. falciparum malaria resistance in Africa mean? Children are the most vulnerable to malaria, and account for two-thirds of the deaths. One study suggests there could be 78 million more cases over a 5-year period, along with far more deaths. Hence, there is a heightened urgency to implement the outlined strategies to prevent a looming catastrophe.

The authors have disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

An antibiotic course of 5 days is usually just as effective as longer courses but with fewer side effects and decreased overall antibiotic exposure for a number of common bacterial conditions, according to new clinical guidelines published by the American College of Physicians.

The guidelines focus on treatment of uncomplicated cases involving pneumonia, urinary tract infections (UTIs), cellulitis, chronic obstructive pulmonary disease (COPD) exacerbations, and acute bronchitis. The goal of the guidelines is to continue improving antibiotic stewardship given the increasing threat of antibiotic resistance and the adverse effects of antibiotics.

“Any use of antibiotics (including necessary use) has downstream effects outside of treating infection,” Dawn Nolt, MD, MPH, a professor of pediatric infection disease at Oregon Health & Science University, Portland, said in an interview. Dr. Nolt was not involved in developing these guidelines. “Undesirable outcomes include allergic reactions, diarrhea, and antibiotic-resistant bacteria. When we reduce unnecessary antibiotic, we reduce undesirable outcomes,” she said.

According to background information in the paper, 1 in 10 patients receives an antibiotic prescription during visits, yet nearly a third of these (30%) are unnecessary and last too long, especially for sinusitis and bronchitis. Meanwhile, overuse of antibiotics, particularly broad-spectrum ones, leads to resistance and adverse effects in up to 20% of patients.

“Prescribing practices can vary based on the type of provider, the setting where the antibiotic is being prescribed, what geographic area you are looking at, the medical reason for which the antibiotic is being prescribed, the actual germ being targeted, and the type of patient,” Dr. Nolt said. “But this variability can be reduced when prescribing providers are aware and follow best practice standards as through this article.”

The new ACP guidelines are a distillation of recommendations from preexisting infectious disease organizations, Dr. Nolt said, but aimed specifically at those practicing internal medicine.

“We define appropriate antibiotic use as prescribing the right antibiotic at the right dose for the right duration for a specific condition,” Rachael A. Lee, MD, MSPH, of the University of Alabama at Birmingham, and colleagues wrote in the article detailing the new guidelines. “Despite evidence and guidelines supporting shorter durations of antibiotic use, many physicians do not prescribe short-course therapy, frequently defaulting to 10-day courses regardless of the condition.”

The reasons for this default response vary. Though some clinicians prescribe longer courses specifically to prevent antibiotic resistance, no evidence shows that continuing to take antibiotics after symptoms have resolved actually reduces likelihood of resistance, the authors noted.

“In fact, resistance is a documented side effect of prolonged antibiotic use due to natural selection pressure,” they wrote.

Another common reason is habit.

“This was the ‘conventional wisdom’ for so long, just trying to make sure all bacteria causing the infection were completely eradicated, with no stragglers that had been exposed to the antibiotic but were not gone and now could evolve into resistant organisms,” Jacqueline W. Fincher, MD, a primary care physician and president of the ACP, said in an interview. “While antibiotic stewardship has been very important for over a decade, we now have more recent head-to-head studies/data showing that, in these four conditions, shorter courses of treatment are just as efficacious with less side effects and adverse events.”

The researchers reviewed all existing clinical guidelines related to bronchitis with COPD exacerbations, community-acquired pneumonia, UTIs, and cellulitis, as well as any other relevant studies in the literature. Although they did not conduct a formal systematic review, they compiled the guidelines specifically for all internists, family physicians and other clinicians caring for patients with these conditions.

“Although most patients with these infections will be seen in the outpatient setting, these best-practice advice statements also apply to patients who present in the inpatient setting,” the authors wrote. They also note the importance of ensuring the patient has the correct diagnosis and appropriate corresponding antibiotic prescription. “If a patient is not improving with appropriate antibiotics, it is important for the clinician to reassess for other causes of symptoms rather than defaulting to a longer duration of antibiotic therapy,” they wrote, calling a longer course “the exception and not the rule.”
 

Acute bronchitis with COPD exacerbations

Antibiotic treatment for COPD exacerbations and acute uncomplicated bronchitis with signs of a bacterial infection should last no longer than 5 days. The authors define this condition as an acute respiratory infection with a normal chest x-ray, most often caused by a virus. Although patients with bronchitis do not automatically need antibiotics if there’s no evidence of pneumonia, the authors did advise antibiotics in cases involving COPD and a high likelihood of bacterial infection. Clinicians should base their choice of antibiotics on the most common bacterial etiology: Haemophilus influenzae, Streptococcus pneumoniae, and Moraxella catarrhalis. Ideal candidates for therapy may include aminopenicillin with clavulanic acid, a macrolide, or a tetracycline.

Community-acquired pneumonia

The initial course of antibiotics should be at least 5 days for pneumonia and only extended after considering validated evidence of the patient’s clinical stability, such as resuming normal vital signs, mental activity, and the ability to eat. Multiple randomized, controlled trials have shown no improved benefit from longer courses, though longer courses are linked to increased adverse events and mortality.

Again, antibiotics used should “cover common pathogens, such as S. pneumoniae, H. influenzae, Mycoplasma pneumoniae, and Staphylococcus aureus, and atypical pathogens, such as Legionella species,” the authors wrote. Options include “amoxicillin, doxycycline, or a macrolide for healthy adults or a beta-lactam with a macrolide or a respiratory fluoroquinolone in patients with comorbidities.”
 

UTIs: Uncomplicated cystitis and pyelonephritis

For women’s bacterial cystitis – 75% of which is caused by Escherichia coli – the guidelines recommend nitrofurantoin for 5 days, trimethoprim-sulfamethoxazole for 3 days, or fosfomycin as a single dose. For uncomplicated pyelonephritis in both men and women, clinicians can consider fluoroquinolones for 5-7 days or trimethoprim-sulfamethoxazole for 14 days, depending on antibiotic susceptibility.

This recommendation does not include UTIs in women who are pregnant or UTIs with other functional abnormalities present, such as obstruction. The authors also intentionally left out acute bacterial prostatitis because of its complexity and how long it can take to treat.
 

Cellulitis

MRSA, which has been increasing in prevalence, is a leading cause of skin and soft-tissue infections, such as necrotizing infections, cellulitis, and erysipelas. Unless the patient has penetrating trauma, evidence of MRSA infection elsewhere, injection drug use, nasal colonization of MRSA, or systemic inflammatory response syndrome, the guidelines recommend a 5- to 6-day course of cephalosporin, penicillin, or clindamycin, extended only if the infection has not improved in 5 days. Further research can narrow down the most appropriate treatment course.

This guidance does not apply to purulent cellulitis, such as conditions with abscesses, furuncles, or carbuncles that typically require incision and drainage.
 

Continuing to get the message out

Dr. Fincher emphasized the importance of continuing to disseminate messaging for clinicians about reducing unnecessary antibiotic use.

“In medicine we are constantly bombarded with new information. It is those patients and disease states that we see and treat every day that are especially important for us as physicians and other clinicians to keep our skills and knowledge base up to date when it comes to use of antibiotics,” Dr. Fincher said in an interview. “We just need to continue to educate and push out the data, guidelines, and recommendations.”

Dr. Nolt added that it’s important to emphasize how to translate these national recommendations into local practices since local guidance can also raise awareness and encourage local compliance.

Other strategies for reducing overuse of antibiotics “include restriction on antibiotics available at health care systems (formulary restriction), not allowing use of antibiotics unless there is discussion about the patient’s case (preauthorization), and reviewing cases of patients on antibiotics and advising on next steps (prospective audit and feedback),” she said.

The research was funded by the ACP. Dr. Lee has received personal fees from this news organization and Prime Education. Dr. Fincher owns stock in Johnson & Johnson and Procter and Gamble. Dr. Nolt and the article’s coauthors disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

An antibiotic course of 5 days is usually just as effective as longer courses but with fewer side effects and decreased overall antibiotic exposure for a number of common bacterial conditions, according to new clinical guidelines published by the American College of Physicians.

The guidelines focus on treatment of uncomplicated cases involving pneumonia, urinary tract infections (UTIs), cellulitis, chronic obstructive pulmonary disease (COPD) exacerbations, and acute bronchitis. The goal of the guidelines is to continue improving antibiotic stewardship given the increasing threat of antibiotic resistance and the adverse effects of antibiotics.

“Any use of antibiotics (including necessary use) has downstream effects outside of treating infection,” Dawn Nolt, MD, MPH, a professor of pediatric infection disease at Oregon Health & Science University, Portland, said in an interview. Dr. Nolt was not involved in developing these guidelines. “Undesirable outcomes include allergic reactions, diarrhea, and antibiotic-resistant bacteria. When we reduce unnecessary antibiotic, we reduce undesirable outcomes,” she said.

According to background information in the paper, 1 in 10 patients receives an antibiotic prescription during visits, yet nearly a third of these (30%) are unnecessary and last too long, especially for sinusitis and bronchitis. Meanwhile, overuse of antibiotics, particularly broad-spectrum ones, leads to resistance and adverse effects in up to 20% of patients.

“Prescribing practices can vary based on the type of provider, the setting where the antibiotic is being prescribed, what geographic area you are looking at, the medical reason for which the antibiotic is being prescribed, the actual germ being targeted, and the type of patient,” Dr. Nolt said. “But this variability can be reduced when prescribing providers are aware and follow best practice standards as through this article.”

The new ACP guidelines are a distillation of recommendations from preexisting infectious disease organizations, Dr. Nolt said, but aimed specifically at those practicing internal medicine.

“We define appropriate antibiotic use as prescribing the right antibiotic at the right dose for the right duration for a specific condition,” Rachael A. Lee, MD, MSPH, of the University of Alabama at Birmingham, and colleagues wrote in the article detailing the new guidelines. “Despite evidence and guidelines supporting shorter durations of antibiotic use, many physicians do not prescribe short-course therapy, frequently defaulting to 10-day courses regardless of the condition.”

The reasons for this default response vary. Though some clinicians prescribe longer courses specifically to prevent antibiotic resistance, no evidence shows that continuing to take antibiotics after symptoms have resolved actually reduces likelihood of resistance, the authors noted.

“In fact, resistance is a documented side effect of prolonged antibiotic use due to natural selection pressure,” they wrote.

Another common reason is habit.

“This was the ‘conventional wisdom’ for so long, just trying to make sure all bacteria causing the infection were completely eradicated, with no stragglers that had been exposed to the antibiotic but were not gone and now could evolve into resistant organisms,” Jacqueline W. Fincher, MD, a primary care physician and president of the ACP, said in an interview. “While antibiotic stewardship has been very important for over a decade, we now have more recent head-to-head studies/data showing that, in these four conditions, shorter courses of treatment are just as efficacious with less side effects and adverse events.”

The researchers reviewed all existing clinical guidelines related to bronchitis with COPD exacerbations, community-acquired pneumonia, UTIs, and cellulitis, as well as any other relevant studies in the literature. Although they did not conduct a formal systematic review, they compiled the guidelines specifically for all internists, family physicians and other clinicians caring for patients with these conditions.

“Although most patients with these infections will be seen in the outpatient setting, these best-practice advice statements also apply to patients who present in the inpatient setting,” the authors wrote. They also note the importance of ensuring the patient has the correct diagnosis and appropriate corresponding antibiotic prescription. “If a patient is not improving with appropriate antibiotics, it is important for the clinician to reassess for other causes of symptoms rather than defaulting to a longer duration of antibiotic therapy,” they wrote, calling a longer course “the exception and not the rule.”
 

Acute bronchitis with COPD exacerbations

Antibiotic treatment for COPD exacerbations and acute uncomplicated bronchitis with signs of a bacterial infection should last no longer than 5 days. The authors define this condition as an acute respiratory infection with a normal chest x-ray, most often caused by a virus. Although patients with bronchitis do not automatically need antibiotics if there’s no evidence of pneumonia, the authors did advise antibiotics in cases involving COPD and a high likelihood of bacterial infection. Clinicians should base their choice of antibiotics on the most common bacterial etiology: Haemophilus influenzae, Streptococcus pneumoniae, and Moraxella catarrhalis. Ideal candidates for therapy may include aminopenicillin with clavulanic acid, a macrolide, or a tetracycline.

Community-acquired pneumonia

The initial course of antibiotics should be at least 5 days for pneumonia and only extended after considering validated evidence of the patient’s clinical stability, such as resuming normal vital signs, mental activity, and the ability to eat. Multiple randomized, controlled trials have shown no improved benefit from longer courses, though longer courses are linked to increased adverse events and mortality.

Again, antibiotics used should “cover common pathogens, such as S. pneumoniae, H. influenzae, Mycoplasma pneumoniae, and Staphylococcus aureus, and atypical pathogens, such as Legionella species,” the authors wrote. Options include “amoxicillin, doxycycline, or a macrolide for healthy adults or a beta-lactam with a macrolide or a respiratory fluoroquinolone in patients with comorbidities.”
 

UTIs: Uncomplicated cystitis and pyelonephritis

For women’s bacterial cystitis – 75% of which is caused by Escherichia coli – the guidelines recommend nitrofurantoin for 5 days, trimethoprim-sulfamethoxazole for 3 days, or fosfomycin as a single dose. For uncomplicated pyelonephritis in both men and women, clinicians can consider fluoroquinolones for 5-7 days or trimethoprim-sulfamethoxazole for 14 days, depending on antibiotic susceptibility.

This recommendation does not include UTIs in women who are pregnant or UTIs with other functional abnormalities present, such as obstruction. The authors also intentionally left out acute bacterial prostatitis because of its complexity and how long it can take to treat.
 

Cellulitis

MRSA, which has been increasing in prevalence, is a leading cause of skin and soft-tissue infections, such as necrotizing infections, cellulitis, and erysipelas. Unless the patient has penetrating trauma, evidence of MRSA infection elsewhere, injection drug use, nasal colonization of MRSA, or systemic inflammatory response syndrome, the guidelines recommend a 5- to 6-day course of cephalosporin, penicillin, or clindamycin, extended only if the infection has not improved in 5 days. Further research can narrow down the most appropriate treatment course.

This guidance does not apply to purulent cellulitis, such as conditions with abscesses, furuncles, or carbuncles that typically require incision and drainage.
 

Continuing to get the message out

Dr. Fincher emphasized the importance of continuing to disseminate messaging for clinicians about reducing unnecessary antibiotic use.

“In medicine we are constantly bombarded with new information. It is those patients and disease states that we see and treat every day that are especially important for us as physicians and other clinicians to keep our skills and knowledge base up to date when it comes to use of antibiotics,” Dr. Fincher said in an interview. “We just need to continue to educate and push out the data, guidelines, and recommendations.”

Dr. Nolt added that it’s important to emphasize how to translate these national recommendations into local practices since local guidance can also raise awareness and encourage local compliance.

Other strategies for reducing overuse of antibiotics “include restriction on antibiotics available at health care systems (formulary restriction), not allowing use of antibiotics unless there is discussion about the patient’s case (preauthorization), and reviewing cases of patients on antibiotics and advising on next steps (prospective audit and feedback),” she said.

The research was funded by the ACP. Dr. Lee has received personal fees from this news organization and Prime Education. Dr. Fincher owns stock in Johnson & Johnson and Procter and Gamble. Dr. Nolt and the article’s coauthors disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

An antibiotic course of 5 days is usually just as effective as longer courses but with fewer side effects and decreased overall antibiotic exposure for a number of common bacterial conditions, according to new clinical guidelines published by the American College of Physicians.

The guidelines focus on treatment of uncomplicated cases involving pneumonia, urinary tract infections (UTIs), cellulitis, chronic obstructive pulmonary disease (COPD) exacerbations, and acute bronchitis. The goal of the guidelines is to continue improving antibiotic stewardship given the increasing threat of antibiotic resistance and the adverse effects of antibiotics.

“Any use of antibiotics (including necessary use) has downstream effects outside of treating infection,” Dawn Nolt, MD, MPH, a professor of pediatric infection disease at Oregon Health & Science University, Portland, said in an interview. Dr. Nolt was not involved in developing these guidelines. “Undesirable outcomes include allergic reactions, diarrhea, and antibiotic-resistant bacteria. When we reduce unnecessary antibiotic, we reduce undesirable outcomes,” she said.

According to background information in the paper, 1 in 10 patients receives an antibiotic prescription during visits, yet nearly a third of these (30%) are unnecessary and last too long, especially for sinusitis and bronchitis. Meanwhile, overuse of antibiotics, particularly broad-spectrum ones, leads to resistance and adverse effects in up to 20% of patients.

“Prescribing practices can vary based on the type of provider, the setting where the antibiotic is being prescribed, what geographic area you are looking at, the medical reason for which the antibiotic is being prescribed, the actual germ being targeted, and the type of patient,” Dr. Nolt said. “But this variability can be reduced when prescribing providers are aware and follow best practice standards as through this article.”

The new ACP guidelines are a distillation of recommendations from preexisting infectious disease organizations, Dr. Nolt said, but aimed specifically at those practicing internal medicine.

“We define appropriate antibiotic use as prescribing the right antibiotic at the right dose for the right duration for a specific condition,” Rachael A. Lee, MD, MSPH, of the University of Alabama at Birmingham, and colleagues wrote in the article detailing the new guidelines. “Despite evidence and guidelines supporting shorter durations of antibiotic use, many physicians do not prescribe short-course therapy, frequently defaulting to 10-day courses regardless of the condition.”

The reasons for this default response vary. Though some clinicians prescribe longer courses specifically to prevent antibiotic resistance, no evidence shows that continuing to take antibiotics after symptoms have resolved actually reduces likelihood of resistance, the authors noted.

“In fact, resistance is a documented side effect of prolonged antibiotic use due to natural selection pressure,” they wrote.

Another common reason is habit.

“This was the ‘conventional wisdom’ for so long, just trying to make sure all bacteria causing the infection were completely eradicated, with no stragglers that had been exposed to the antibiotic but were not gone and now could evolve into resistant organisms,” Jacqueline W. Fincher, MD, a primary care physician and president of the ACP, said in an interview. “While antibiotic stewardship has been very important for over a decade, we now have more recent head-to-head studies/data showing that, in these four conditions, shorter courses of treatment are just as efficacious with less side effects and adverse events.”

The researchers reviewed all existing clinical guidelines related to bronchitis with COPD exacerbations, community-acquired pneumonia, UTIs, and cellulitis, as well as any other relevant studies in the literature. Although they did not conduct a formal systematic review, they compiled the guidelines specifically for all internists, family physicians and other clinicians caring for patients with these conditions.

“Although most patients with these infections will be seen in the outpatient setting, these best-practice advice statements also apply to patients who present in the inpatient setting,” the authors wrote. They also note the importance of ensuring the patient has the correct diagnosis and appropriate corresponding antibiotic prescription. “If a patient is not improving with appropriate antibiotics, it is important for the clinician to reassess for other causes of symptoms rather than defaulting to a longer duration of antibiotic therapy,” they wrote, calling a longer course “the exception and not the rule.”
 

Acute bronchitis with COPD exacerbations

Antibiotic treatment for COPD exacerbations and acute uncomplicated bronchitis with signs of a bacterial infection should last no longer than 5 days. The authors define this condition as an acute respiratory infection with a normal chest x-ray, most often caused by a virus. Although patients with bronchitis do not automatically need antibiotics if there’s no evidence of pneumonia, the authors did advise antibiotics in cases involving COPD and a high likelihood of bacterial infection. Clinicians should base their choice of antibiotics on the most common bacterial etiology: Haemophilus influenzae, Streptococcus pneumoniae, and Moraxella catarrhalis. Ideal candidates for therapy may include aminopenicillin with clavulanic acid, a macrolide, or a tetracycline.

Community-acquired pneumonia

The initial course of antibiotics should be at least 5 days for pneumonia and only extended after considering validated evidence of the patient’s clinical stability, such as resuming normal vital signs, mental activity, and the ability to eat. Multiple randomized, controlled trials have shown no improved benefit from longer courses, though longer courses are linked to increased adverse events and mortality.

Again, antibiotics used should “cover common pathogens, such as S. pneumoniae, H. influenzae, Mycoplasma pneumoniae, and Staphylococcus aureus, and atypical pathogens, such as Legionella species,” the authors wrote. Options include “amoxicillin, doxycycline, or a macrolide for healthy adults or a beta-lactam with a macrolide or a respiratory fluoroquinolone in patients with comorbidities.”
 

UTIs: Uncomplicated cystitis and pyelonephritis

For women’s bacterial cystitis – 75% of which is caused by Escherichia coli – the guidelines recommend nitrofurantoin for 5 days, trimethoprim-sulfamethoxazole for 3 days, or fosfomycin as a single dose. For uncomplicated pyelonephritis in both men and women, clinicians can consider fluoroquinolones for 5-7 days or trimethoprim-sulfamethoxazole for 14 days, depending on antibiotic susceptibility.

This recommendation does not include UTIs in women who are pregnant or UTIs with other functional abnormalities present, such as obstruction. The authors also intentionally left out acute bacterial prostatitis because of its complexity and how long it can take to treat.
 

Cellulitis

MRSA, which has been increasing in prevalence, is a leading cause of skin and soft-tissue infections, such as necrotizing infections, cellulitis, and erysipelas. Unless the patient has penetrating trauma, evidence of MRSA infection elsewhere, injection drug use, nasal colonization of MRSA, or systemic inflammatory response syndrome, the guidelines recommend a 5- to 6-day course of cephalosporin, penicillin, or clindamycin, extended only if the infection has not improved in 5 days. Further research can narrow down the most appropriate treatment course.

This guidance does not apply to purulent cellulitis, such as conditions with abscesses, furuncles, or carbuncles that typically require incision and drainage.
 

Continuing to get the message out

Dr. Fincher emphasized the importance of continuing to disseminate messaging for clinicians about reducing unnecessary antibiotic use.

“In medicine we are constantly bombarded with new information. It is those patients and disease states that we see and treat every day that are especially important for us as physicians and other clinicians to keep our skills and knowledge base up to date when it comes to use of antibiotics,” Dr. Fincher said in an interview. “We just need to continue to educate and push out the data, guidelines, and recommendations.”

Dr. Nolt added that it’s important to emphasize how to translate these national recommendations into local practices since local guidance can also raise awareness and encourage local compliance.

Other strategies for reducing overuse of antibiotics “include restriction on antibiotics available at health care systems (formulary restriction), not allowing use of antibiotics unless there is discussion about the patient’s case (preauthorization), and reviewing cases of patients on antibiotics and advising on next steps (prospective audit and feedback),” she said.

The research was funded by the ACP. Dr. Lee has received personal fees from this news organization and Prime Education. Dr. Fincher owns stock in Johnson & Johnson and Procter and Gamble. Dr. Nolt and the article’s coauthors disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Women living in rural areas were significantly more likely than were those in urban areas to receive inappropriate antibiotic prescriptions for urinary tract infections, based on data from an observational cohort study of more than 600,000 women.

Uncomplicated urinary tract infections (UTIs) are common among otherwise healthy women in the United States, and certain antibiotics are recommended as first-line therapy, wrote Abbye W. Clark, MD, of Washington University, St. Louis, and colleagues.

“However, the majority of antibiotic prescriptions for uncomplicated UTI are suboptimal because they are written for nonrecommended agents and durations,” they said.

Addressing rural health disparities has become a focus in the United States, and previous studies of respiratory tract infections have shown differences in antibiotic prescribing based on geographic region; “however, no large-scale studies have evaluated rural-urban differences in inappropriate outpatient prescribing for UTI,” they added.

In a study published in Infection Control & Hospital Epidemiology, the researchers identified 670,450 women aged 18-44 years who received oral antibiotics for uncomplicated UTIs between 2010 to 2015, using a commercial insurance database to determine diagnosis and antibiotic prescription information. Women were defined as urban if they lived in a metropolitan statistical area of at least 50,000 inhabitants (86.2%); all other women were defined as rural (13.8%). The median age was 30 years for both groups.

Overall, 46.7% of the women received prescriptions for inappropriate antibiotics, and 76.1% received antibiotics for inappropriate durations.

Antibiotics and durations were defined as appropriate or inappropriate based on current clinical guidelines. “We classified first-line agents (nitrofurantoin, TMP-SMX, fosfomycin) as appropriate and non–first-line agents (fluoroquinolones, beta-lactams) as inappropriate,” the researchers said.

The regimens classified as appropriate duration were “nitrofurantoin 5-day regimen, TMP-SMX (including TMP monotherapy) 3-day regimen, fosfomycin 1-day regimen, fluoroquinolones 3-day regimen, and beta-lactams 3- to 7-day regimen. All other regimens were classified as inappropriate duration,” they noted.
 

More rural women receive long-duration antibiotics

In a multivariate analysis, similar percentages of antibiotics for rural and urban women consisted of inappropriate agents (45.9% vs. 46.9%) including use of fluoroquinolones (41.0% vs. 41.7%) and beta-lactams (4.8% vs. 5.0%).

However, across all antibiotics, women in rural areas were more likely than were women in urban areas to receive prescriptions for inappropriately long durations (83.9% vs. 75.9%, adjusted risk ratio 1.10).

The percentage of women who received inappropriate antibiotic agents was not significantly different based on geographic region of the country.

From 2011 to 2015, the quarterly proportion of women overall who received inappropriate agents and antibiotics for inappropriate durations decreased slightly (48.5% to 43.7% and 78.3% to 73.4%, respectively), the researchers noted.

The study findings were limited by several factors including the potentially lenient definition of antibiotic duration, a study population that disproportionately oversampled from the South and undersampled from the West, use of ZIP codes to determine rural vs. urban status, lack of data on race and income, and lack of access to urine culture results, the researchers noted.

However, “our study identified rural-urban differences in antibiotic prescribing, including an actionable disparity in the duration of antibiotics that disproportionately affects women who live in rural locations,” they said.

“Given the large quantity of inappropriate prescriptions annually in the U.S., as well as the negative patient- and society-level consequences of unnecessary exposure to antibiotics, antimicrobial stewardship interventions are needed to improve outpatient UTI antibiotic prescribing, particularly in rural settings,” they concluded.
 

Data support need for education and stewardship

“This manuscript provides valuable information to all women’s health providers regarding the importance of antibiotic stewardship,” David M. Jaspan, DO, and Natasha Abdullah, MD, Einstein Medical Center, Philadelphia, said in an interview. Whether urban or rural, over 45% of the patients received inappropriate non–first-line treatment and 76% of the prescriptions were for an inappropriate duration (98.8% for longer than recommended), they emphasized.

“The potential negative impact of antibiotic resistance, coupled with the potential for increased side effects, should prompt providers to ensure that when treating uncomplicated UTIs in women, that the choice of treatment and the duration of treatment is tailored to the patient’s needs,” the Dr. Jaspan and Dr. Abdullah said.

To improve antibiotic prescribing, especially at the local and regional level, “We encourage providers to familiarize themselves with local information as it pertains to known resistance when prescribing empiric treatment regimens for uncomplicated UTIs,” they said.

The study was supported by the National Center for Advancing Translational Sciences at the National Institutes of Health. Lead author Dr. Clark, as well as Dr. Jaspan and Dr. Abdullah, had no financial conflicts to disclose.

Women living in rural areas were significantly more likely than were those in urban areas to receive inappropriate antibiotic prescriptions for urinary tract infections, based on data from an observational cohort study of more than 600,000 women.

Uncomplicated urinary tract infections (UTIs) are common among otherwise healthy women in the United States, and certain antibiotics are recommended as first-line therapy, wrote Abbye W. Clark, MD, of Washington University, St. Louis, and colleagues.

“However, the majority of antibiotic prescriptions for uncomplicated UTI are suboptimal because they are written for nonrecommended agents and durations,” they said.

Addressing rural health disparities has become a focus in the United States, and previous studies of respiratory tract infections have shown differences in antibiotic prescribing based on geographic region; “however, no large-scale studies have evaluated rural-urban differences in inappropriate outpatient prescribing for UTI,” they added.

In a study published in Infection Control & Hospital Epidemiology, the researchers identified 670,450 women aged 18-44 years who received oral antibiotics for uncomplicated UTIs between 2010 to 2015, using a commercial insurance database to determine diagnosis and antibiotic prescription information. Women were defined as urban if they lived in a metropolitan statistical area of at least 50,000 inhabitants (86.2%); all other women were defined as rural (13.8%). The median age was 30 years for both groups.

Overall, 46.7% of the women received prescriptions for inappropriate antibiotics, and 76.1% received antibiotics for inappropriate durations.

Antibiotics and durations were defined as appropriate or inappropriate based on current clinical guidelines. “We classified first-line agents (nitrofurantoin, TMP-SMX, fosfomycin) as appropriate and non–first-line agents (fluoroquinolones, beta-lactams) as inappropriate,” the researchers said.

The regimens classified as appropriate duration were “nitrofurantoin 5-day regimen, TMP-SMX (including TMP monotherapy) 3-day regimen, fosfomycin 1-day regimen, fluoroquinolones 3-day regimen, and beta-lactams 3- to 7-day regimen. All other regimens were classified as inappropriate duration,” they noted.
 

More rural women receive long-duration antibiotics

In a multivariate analysis, similar percentages of antibiotics for rural and urban women consisted of inappropriate agents (45.9% vs. 46.9%) including use of fluoroquinolones (41.0% vs. 41.7%) and beta-lactams (4.8% vs. 5.0%).

However, across all antibiotics, women in rural areas were more likely than were women in urban areas to receive prescriptions for inappropriately long durations (83.9% vs. 75.9%, adjusted risk ratio 1.10).

The percentage of women who received inappropriate antibiotic agents was not significantly different based on geographic region of the country.

From 2011 to 2015, the quarterly proportion of women overall who received inappropriate agents and antibiotics for inappropriate durations decreased slightly (48.5% to 43.7% and 78.3% to 73.4%, respectively), the researchers noted.

The study findings were limited by several factors including the potentially lenient definition of antibiotic duration, a study population that disproportionately oversampled from the South and undersampled from the West, use of ZIP codes to determine rural vs. urban status, lack of data on race and income, and lack of access to urine culture results, the researchers noted.

However, “our study identified rural-urban differences in antibiotic prescribing, including an actionable disparity in the duration of antibiotics that disproportionately affects women who live in rural locations,” they said.

“Given the large quantity of inappropriate prescriptions annually in the U.S., as well as the negative patient- and society-level consequences of unnecessary exposure to antibiotics, antimicrobial stewardship interventions are needed to improve outpatient UTI antibiotic prescribing, particularly in rural settings,” they concluded.
 

Data support need for education and stewardship

“This manuscript provides valuable information to all women’s health providers regarding the importance of antibiotic stewardship,” David M. Jaspan, DO, and Natasha Abdullah, MD, Einstein Medical Center, Philadelphia, said in an interview. Whether urban or rural, over 45% of the patients received inappropriate non–first-line treatment and 76% of the prescriptions were for an inappropriate duration (98.8% for longer than recommended), they emphasized.

“The potential negative impact of antibiotic resistance, coupled with the potential for increased side effects, should prompt providers to ensure that when treating uncomplicated UTIs in women, that the choice of treatment and the duration of treatment is tailored to the patient’s needs,” the Dr. Jaspan and Dr. Abdullah said.

To improve antibiotic prescribing, especially at the local and regional level, “We encourage providers to familiarize themselves with local information as it pertains to known resistance when prescribing empiric treatment regimens for uncomplicated UTIs,” they said.

The study was supported by the National Center for Advancing Translational Sciences at the National Institutes of Health. Lead author Dr. Clark, as well as Dr. Jaspan and Dr. Abdullah, had no financial conflicts to disclose.

Women living in rural areas were significantly more likely than were those in urban areas to receive inappropriate antibiotic prescriptions for urinary tract infections, based on data from an observational cohort study of more than 600,000 women.

Uncomplicated urinary tract infections (UTIs) are common among otherwise healthy women in the United States, and certain antibiotics are recommended as first-line therapy, wrote Abbye W. Clark, MD, of Washington University, St. Louis, and colleagues.

“However, the majority of antibiotic prescriptions for uncomplicated UTI are suboptimal because they are written for nonrecommended agents and durations,” they said.

Addressing rural health disparities has become a focus in the United States, and previous studies of respiratory tract infections have shown differences in antibiotic prescribing based on geographic region; “however, no large-scale studies have evaluated rural-urban differences in inappropriate outpatient prescribing for UTI,” they added.

In a study published in Infection Control & Hospital Epidemiology, the researchers identified 670,450 women aged 18-44 years who received oral antibiotics for uncomplicated UTIs between 2010 to 2015, using a commercial insurance database to determine diagnosis and antibiotic prescription information. Women were defined as urban if they lived in a metropolitan statistical area of at least 50,000 inhabitants (86.2%); all other women were defined as rural (13.8%). The median age was 30 years for both groups.

Overall, 46.7% of the women received prescriptions for inappropriate antibiotics, and 76.1% received antibiotics for inappropriate durations.

Antibiotics and durations were defined as appropriate or inappropriate based on current clinical guidelines. “We classified first-line agents (nitrofurantoin, TMP-SMX, fosfomycin) as appropriate and non–first-line agents (fluoroquinolones, beta-lactams) as inappropriate,” the researchers said.

The regimens classified as appropriate duration were “nitrofurantoin 5-day regimen, TMP-SMX (including TMP monotherapy) 3-day regimen, fosfomycin 1-day regimen, fluoroquinolones 3-day regimen, and beta-lactams 3- to 7-day regimen. All other regimens were classified as inappropriate duration,” they noted.
 

More rural women receive long-duration antibiotics

In a multivariate analysis, similar percentages of antibiotics for rural and urban women consisted of inappropriate agents (45.9% vs. 46.9%) including use of fluoroquinolones (41.0% vs. 41.7%) and beta-lactams (4.8% vs. 5.0%).

However, across all antibiotics, women in rural areas were more likely than were women in urban areas to receive prescriptions for inappropriately long durations (83.9% vs. 75.9%, adjusted risk ratio 1.10).

The percentage of women who received inappropriate antibiotic agents was not significantly different based on geographic region of the country.

From 2011 to 2015, the quarterly proportion of women overall who received inappropriate agents and antibiotics for inappropriate durations decreased slightly (48.5% to 43.7% and 78.3% to 73.4%, respectively), the researchers noted.

The study findings were limited by several factors including the potentially lenient definition of antibiotic duration, a study population that disproportionately oversampled from the South and undersampled from the West, use of ZIP codes to determine rural vs. urban status, lack of data on race and income, and lack of access to urine culture results, the researchers noted.

However, “our study identified rural-urban differences in antibiotic prescribing, including an actionable disparity in the duration of antibiotics that disproportionately affects women who live in rural locations,” they said.

“Given the large quantity of inappropriate prescriptions annually in the U.S., as well as the negative patient- and society-level consequences of unnecessary exposure to antibiotics, antimicrobial stewardship interventions are needed to improve outpatient UTI antibiotic prescribing, particularly in rural settings,” they concluded.
 

Data support need for education and stewardship

“This manuscript provides valuable information to all women’s health providers regarding the importance of antibiotic stewardship,” David M. Jaspan, DO, and Natasha Abdullah, MD, Einstein Medical Center, Philadelphia, said in an interview. Whether urban or rural, over 45% of the patients received inappropriate non–first-line treatment and 76% of the prescriptions were for an inappropriate duration (98.8% for longer than recommended), they emphasized.

“The potential negative impact of antibiotic resistance, coupled with the potential for increased side effects, should prompt providers to ensure that when treating uncomplicated UTIs in women, that the choice of treatment and the duration of treatment is tailored to the patient’s needs,” the Dr. Jaspan and Dr. Abdullah said.

To improve antibiotic prescribing, especially at the local and regional level, “We encourage providers to familiarize themselves with local information as it pertains to known resistance when prescribing empiric treatment regimens for uncomplicated UTIs,” they said.

The study was supported by the National Center for Advancing Translational Sciences at the National Institutes of Health. Lead author Dr. Clark, as well as Dr. Jaspan and Dr. Abdullah, had no financial conflicts to disclose.