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Why Size (of Your Differential) Matters
ANSWER
The correct answer is all of the above (choice “f”).
DISCUSSION
The most likely diagnostic explanation for this patient’s presentation is erythema annulare centrifugum (EAC; choice “c”). However, this diagnosis is often difficult to establish, in part because of the broad differential and also because the very existence of EAC is far from well established.
The overwhelming consensus is that EAC represents a hypersensitivity reaction to an unknown antigen. It can be triggered by a wide variety of micro-organisms, stress, or even pregnancy.
In this case, there was no clinical or historical reason to suspect an underlying cancer, Lyme disease, or lupus, nor did the biopsy results suggest any of these.
The key takeaway here is to urge providers to avoid jumping onto a diagnostic bandwagon before considering a wider differential. Indeed, size matters when it relates to the length of one’s differential diagnosis list. If you don’t consider it, you can’t diagnose it.
TREATMENT
Fortunately, EAC nearly always resolves, with or without treatment. This patient received reassurance as such but was scheduled to return for a check of his lesions in 2 months. At that point, they had resolved.
ANSWER
The correct answer is all of the above (choice “f”).
DISCUSSION
The most likely diagnostic explanation for this patient’s presentation is erythema annulare centrifugum (EAC; choice “c”). However, this diagnosis is often difficult to establish, in part because of the broad differential and also because the very existence of EAC is far from well established.
The overwhelming consensus is that EAC represents a hypersensitivity reaction to an unknown antigen. It can be triggered by a wide variety of micro-organisms, stress, or even pregnancy.
In this case, there was no clinical or historical reason to suspect an underlying cancer, Lyme disease, or lupus, nor did the biopsy results suggest any of these.
The key takeaway here is to urge providers to avoid jumping onto a diagnostic bandwagon before considering a wider differential. Indeed, size matters when it relates to the length of one’s differential diagnosis list. If you don’t consider it, you can’t diagnose it.
TREATMENT
Fortunately, EAC nearly always resolves, with or without treatment. This patient received reassurance as such but was scheduled to return for a check of his lesions in 2 months. At that point, they had resolved.
ANSWER
The correct answer is all of the above (choice “f”).
DISCUSSION
The most likely diagnostic explanation for this patient’s presentation is erythema annulare centrifugum (EAC; choice “c”). However, this diagnosis is often difficult to establish, in part because of the broad differential and also because the very existence of EAC is far from well established.
The overwhelming consensus is that EAC represents a hypersensitivity reaction to an unknown antigen. It can be triggered by a wide variety of micro-organisms, stress, or even pregnancy.
In this case, there was no clinical or historical reason to suspect an underlying cancer, Lyme disease, or lupus, nor did the biopsy results suggest any of these.
The key takeaway here is to urge providers to avoid jumping onto a diagnostic bandwagon before considering a wider differential. Indeed, size matters when it relates to the length of one’s differential diagnosis list. If you don’t consider it, you can’t diagnose it.
TREATMENT
Fortunately, EAC nearly always resolves, with or without treatment. This patient received reassurance as such but was scheduled to return for a check of his lesions in 2 months. At that point, they had resolved.
A 50-year-old man is astonished when his “fungal infection” fails to respond to an unknown OTC topical cream a friend advised him to use.
For several weeks, he’s been plagued by the slightly itchy lesions that appeared on his leg without known cause. His friend assured him that the shape and configuration of the lesions could only represent one thing: “ringworm,” that is, fungal infection.
However, in clinic, the patient denies any contact with animals or children and reports that his job is inside only, never involving the great outdoors. He has felt fine throughout the lesions’ tenure, going so far as to say he is “in perfect health.” He has been in a mutually monogamous relationship for many years.
The lesions (4 in total) are located on the medial aspect of the left leg, extending into the popliteal area. At first glance, they appear to be peripherally scaly, pink, and annular. Close inspection reveals that most of the scaling is not on the outer edge; it is confined to the inside of the border, a phenomenon termed trailing or centripetal scaling. The lesions all show an arciform morphology in the shape of a “C.”
KOH examination of the scale shows no fungal elements. Shave biopsy reveals a dense perivascular lymphocytic infiltrate, moderate parakeratosis, and perhaps most importantly, no fungal elements in the stratum corneum.
There are no palpable lymph nodes in the groin on the affected side.
Syphilis prevalence in MSM 15 times higher than in general population
Worldwide, nearly 8% of men who have sex with men (MSM) may have syphilis, a new systematic review and meta-analysis suggests. This estimate, generated from 275 studies across 77 countries, is 15 times greater than the most recent estimates of syphilis prevalence in men in a general population.
“That disparity is absolutely unacceptable,” Matthew Chico, PhD, associate professor at the London School of Hygiene and Tropical Medicine, and senior author of the review, said in an interview.
Although the World Health Organization (WHO) aims to reduce the global prevalence of syphilis by 90% by 2030, an ambitious goal set in 2016, recent research suggests syphilis numbers are moving in the opposite direction. Cases in the United States rose 74% between 2015 and 2019, and other nations, such as Australia, South Korea, and the United Kingdom, are seeing similar trends.
Syphilis prevalence is generally higher in MSM, largely in subpopulations of men who have multiple sexual partners, Kenneth Mayer, MD, said in an interview. Dr. Mayer is medical research director at the Fenway Institute, Boston, and was not involved with the study.
Health literacy, lack of access to care, and medical mistrust can all be challenges to screening, identifying, and treating the infection in this population.
Reducing syphilis cases will require focusing interventions on higher-risk groups such as MSM, said Dr. Chico; however, there was “a real dearth in knowledge about the most likely prevalence of syphilis among MSM on a global level,” he said.
To help fill in the gaps, Dr. Chico and his research team collected studies that included syphilis prevalence data for MSM published between Jan. 1, 2000, and Feb. 1, 2020. Researchers excluded studies that included only MSM living with HIV, injection drug users, patients who routinely visit sexually transmitted infection (STI) clinics, and people seeking care only for STIs or other genital symptoms, because these studies would have skewed global syphilis prevalence estimates higher.
Their review, published July 8 in The Lancet Global Health, found that the pooled global prevalence of syphilis from 2000-2020 in MSM was 7.5%. It ranged from 1.9% in Australia and New Zealand to 10.6% in Latin America and the Caribbean. In comparison, the WHO estimates that globally, 0.5% of men in a general population have syphilis, a 15-fold difference.
This elevated estimate is not surprising, and the review provides a more international view of syphilis. Earlier attempts to estimate the prevalence of syphilis among MSM were generally conducted in higher-income countries such as the United States, Dr. Mayer said. “It’s important that clinicians recognize that this is a global health issue, so they can do the appropriate screening.”
The review found that regions in which the prevalence of HIV was above 5% had higher rates of syphilis (8.7%) compared to regions in which the prevalence of HIV was below 5% (6.6%). Pooled syphilis prevalence estimates were also higher for lower-middle-income and upper-middle-income countries (8.7% and 8.6%, respectively).
Global syphilis prevalence dipped from 8.9% in studies from 2000 to 2009 to 6.6% in studies from 2010 to 2020. In Europe, Northern America, Latin America, the Caribbean, and Oceania (excluding Australia and New Zealand), syphilis prevalence estimates for 2015-2020 were higher compared with 2010-2014.
The authors acknowledged that there were some limitations to the study, particularly that regions of Eastern and Southeastern Asia contributed more than half (54.5%) of the global data points used in the study and accounted for more than 82% of the study’s participants. This highlights the lack of data from other regions around the world, Dr. Chico said.
Dr. Chico said these findings “serve as a clarion call to action” to focus interventions on groups at higher risk for syphilis, such as MSM, in the effort to drastically reduce syphilis cases around the world. Dr. Mayer agrees. “[Syphilis] is a readily diagnosable and treatable infection,” he said. “It definitely is something that we should be able to get a handle on, but that requires paying attention to the different subgroups who have particularly high rates of the infection.”
A version of this article first appeared on Medscape.com.
Worldwide, nearly 8% of men who have sex with men (MSM) may have syphilis, a new systematic review and meta-analysis suggests. This estimate, generated from 275 studies across 77 countries, is 15 times greater than the most recent estimates of syphilis prevalence in men in a general population.
“That disparity is absolutely unacceptable,” Matthew Chico, PhD, associate professor at the London School of Hygiene and Tropical Medicine, and senior author of the review, said in an interview.
Although the World Health Organization (WHO) aims to reduce the global prevalence of syphilis by 90% by 2030, an ambitious goal set in 2016, recent research suggests syphilis numbers are moving in the opposite direction. Cases in the United States rose 74% between 2015 and 2019, and other nations, such as Australia, South Korea, and the United Kingdom, are seeing similar trends.
Syphilis prevalence is generally higher in MSM, largely in subpopulations of men who have multiple sexual partners, Kenneth Mayer, MD, said in an interview. Dr. Mayer is medical research director at the Fenway Institute, Boston, and was not involved with the study.
Health literacy, lack of access to care, and medical mistrust can all be challenges to screening, identifying, and treating the infection in this population.
Reducing syphilis cases will require focusing interventions on higher-risk groups such as MSM, said Dr. Chico; however, there was “a real dearth in knowledge about the most likely prevalence of syphilis among MSM on a global level,” he said.
To help fill in the gaps, Dr. Chico and his research team collected studies that included syphilis prevalence data for MSM published between Jan. 1, 2000, and Feb. 1, 2020. Researchers excluded studies that included only MSM living with HIV, injection drug users, patients who routinely visit sexually transmitted infection (STI) clinics, and people seeking care only for STIs or other genital symptoms, because these studies would have skewed global syphilis prevalence estimates higher.
Their review, published July 8 in The Lancet Global Health, found that the pooled global prevalence of syphilis from 2000-2020 in MSM was 7.5%. It ranged from 1.9% in Australia and New Zealand to 10.6% in Latin America and the Caribbean. In comparison, the WHO estimates that globally, 0.5% of men in a general population have syphilis, a 15-fold difference.
This elevated estimate is not surprising, and the review provides a more international view of syphilis. Earlier attempts to estimate the prevalence of syphilis among MSM were generally conducted in higher-income countries such as the United States, Dr. Mayer said. “It’s important that clinicians recognize that this is a global health issue, so they can do the appropriate screening.”
The review found that regions in which the prevalence of HIV was above 5% had higher rates of syphilis (8.7%) compared to regions in which the prevalence of HIV was below 5% (6.6%). Pooled syphilis prevalence estimates were also higher for lower-middle-income and upper-middle-income countries (8.7% and 8.6%, respectively).
Global syphilis prevalence dipped from 8.9% in studies from 2000 to 2009 to 6.6% in studies from 2010 to 2020. In Europe, Northern America, Latin America, the Caribbean, and Oceania (excluding Australia and New Zealand), syphilis prevalence estimates for 2015-2020 were higher compared with 2010-2014.
The authors acknowledged that there were some limitations to the study, particularly that regions of Eastern and Southeastern Asia contributed more than half (54.5%) of the global data points used in the study and accounted for more than 82% of the study’s participants. This highlights the lack of data from other regions around the world, Dr. Chico said.
Dr. Chico said these findings “serve as a clarion call to action” to focus interventions on groups at higher risk for syphilis, such as MSM, in the effort to drastically reduce syphilis cases around the world. Dr. Mayer agrees. “[Syphilis] is a readily diagnosable and treatable infection,” he said. “It definitely is something that we should be able to get a handle on, but that requires paying attention to the different subgroups who have particularly high rates of the infection.”
A version of this article first appeared on Medscape.com.
Worldwide, nearly 8% of men who have sex with men (MSM) may have syphilis, a new systematic review and meta-analysis suggests. This estimate, generated from 275 studies across 77 countries, is 15 times greater than the most recent estimates of syphilis prevalence in men in a general population.
“That disparity is absolutely unacceptable,” Matthew Chico, PhD, associate professor at the London School of Hygiene and Tropical Medicine, and senior author of the review, said in an interview.
Although the World Health Organization (WHO) aims to reduce the global prevalence of syphilis by 90% by 2030, an ambitious goal set in 2016, recent research suggests syphilis numbers are moving in the opposite direction. Cases in the United States rose 74% between 2015 and 2019, and other nations, such as Australia, South Korea, and the United Kingdom, are seeing similar trends.
Syphilis prevalence is generally higher in MSM, largely in subpopulations of men who have multiple sexual partners, Kenneth Mayer, MD, said in an interview. Dr. Mayer is medical research director at the Fenway Institute, Boston, and was not involved with the study.
Health literacy, lack of access to care, and medical mistrust can all be challenges to screening, identifying, and treating the infection in this population.
Reducing syphilis cases will require focusing interventions on higher-risk groups such as MSM, said Dr. Chico; however, there was “a real dearth in knowledge about the most likely prevalence of syphilis among MSM on a global level,” he said.
To help fill in the gaps, Dr. Chico and his research team collected studies that included syphilis prevalence data for MSM published between Jan. 1, 2000, and Feb. 1, 2020. Researchers excluded studies that included only MSM living with HIV, injection drug users, patients who routinely visit sexually transmitted infection (STI) clinics, and people seeking care only for STIs or other genital symptoms, because these studies would have skewed global syphilis prevalence estimates higher.
Their review, published July 8 in The Lancet Global Health, found that the pooled global prevalence of syphilis from 2000-2020 in MSM was 7.5%. It ranged from 1.9% in Australia and New Zealand to 10.6% in Latin America and the Caribbean. In comparison, the WHO estimates that globally, 0.5% of men in a general population have syphilis, a 15-fold difference.
This elevated estimate is not surprising, and the review provides a more international view of syphilis. Earlier attempts to estimate the prevalence of syphilis among MSM were generally conducted in higher-income countries such as the United States, Dr. Mayer said. “It’s important that clinicians recognize that this is a global health issue, so they can do the appropriate screening.”
The review found that regions in which the prevalence of HIV was above 5% had higher rates of syphilis (8.7%) compared to regions in which the prevalence of HIV was below 5% (6.6%). Pooled syphilis prevalence estimates were also higher for lower-middle-income and upper-middle-income countries (8.7% and 8.6%, respectively).
Global syphilis prevalence dipped from 8.9% in studies from 2000 to 2009 to 6.6% in studies from 2010 to 2020. In Europe, Northern America, Latin America, the Caribbean, and Oceania (excluding Australia and New Zealand), syphilis prevalence estimates for 2015-2020 were higher compared with 2010-2014.
The authors acknowledged that there were some limitations to the study, particularly that regions of Eastern and Southeastern Asia contributed more than half (54.5%) of the global data points used in the study and accounted for more than 82% of the study’s participants. This highlights the lack of data from other regions around the world, Dr. Chico said.
Dr. Chico said these findings “serve as a clarion call to action” to focus interventions on groups at higher risk for syphilis, such as MSM, in the effort to drastically reduce syphilis cases around the world. Dr. Mayer agrees. “[Syphilis] is a readily diagnosable and treatable infection,” he said. “It definitely is something that we should be able to get a handle on, but that requires paying attention to the different subgroups who have particularly high rates of the infection.”
A version of this article first appeared on Medscape.com.
A healthy family who had been living in Brazil presented with crusted plaques on their extremities
Trypanosomatidae
Leishmaniasis is caused by protozoa of the family Trypanosomatidae, called Leishmania. The vector is a sandfly infected with the protozoa.1
The three main forms of leishmaniasis – cutaneous, mucocutaneous, or visceral – varies with the species of organism involved, the geographic distribution, and the immune response of the patient. A majority of the cases seen in the United States are from patients who contracted the disease elsewhere, particularly from Peru and Brazil.2
Lesions can vary from asymptomatic to severe. The initial lesion typically develops within weeks or months, and presents as an erythematous papule that is seen at the bite site.3 The papule evolves into a nodule or plaque that may ulcerate and crust.3 The ulcer can be distinguished by a raised and distinct border. In older stages, atrophic scarring may be seen. In some cases, the lesions may present years after exposure, because of immunosuppression or trauma.
Histology of CL reveals tuberculoid granulomas with parasitized histiocytes present. Amastigotes with distinct nuclei and kinetoplasts characterize Leishmania.2 In addition to histology, the biopsy may be sent for the press-imprint-smear method (PIS). In a study of 75 patients, the PIS method showed a higher sensitivity, as well as being a less costly and more rapid option for diagnosis.5
The treatment depends on the severity of the lesion and the species of the Leishmania genus. Mild lesions may resolve spontaneously. Topical imiquimod, cryotherapy, photodynamic therapy, and heat therapy may aid in the healing process.5 Systemic azole antifungal medications, miltefosine, and amphotericin B, and pentamidine may be used for more persistent lesions. In very severe cases, pentavalent antimonials (sodium stibogluconate, Pentostam) may be administered intravenously, although there is a high occurrence of recorded side effects.2
This case and the photos were submitted by Sabrina Liao, BS, University of California, San Diego; and Brooke Resh Sateesh, MD, San Diego Family Dermatology The case was edited by Donna Bilu Martin, MD.
References
1. Leishmaniasis – Resources for Health Professionals. Centers for Disease Control and Prevention. 2021 Jun 3.
2. Stark CG. Leishmaniasis. Medscape. 2020 Feb 18.
3. Markle WH and Makhoul K. Am Fam Physician. 2004 Mar 15;69(6):1455-604.
4. Ngan V. Leishmaniasis. DermNet NZ. 2017 Jan. 7.
5. Sousa AQ et al. Am J Trop Med Hyg. 2014 Nov;91(5):905-7.
Trypanosomatidae
Leishmaniasis is caused by protozoa of the family Trypanosomatidae, called Leishmania. The vector is a sandfly infected with the protozoa.1
The three main forms of leishmaniasis – cutaneous, mucocutaneous, or visceral – varies with the species of organism involved, the geographic distribution, and the immune response of the patient. A majority of the cases seen in the United States are from patients who contracted the disease elsewhere, particularly from Peru and Brazil.2
Lesions can vary from asymptomatic to severe. The initial lesion typically develops within weeks or months, and presents as an erythematous papule that is seen at the bite site.3 The papule evolves into a nodule or plaque that may ulcerate and crust.3 The ulcer can be distinguished by a raised and distinct border. In older stages, atrophic scarring may be seen. In some cases, the lesions may present years after exposure, because of immunosuppression or trauma.
Histology of CL reveals tuberculoid granulomas with parasitized histiocytes present. Amastigotes with distinct nuclei and kinetoplasts characterize Leishmania.2 In addition to histology, the biopsy may be sent for the press-imprint-smear method (PIS). In a study of 75 patients, the PIS method showed a higher sensitivity, as well as being a less costly and more rapid option for diagnosis.5
The treatment depends on the severity of the lesion and the species of the Leishmania genus. Mild lesions may resolve spontaneously. Topical imiquimod, cryotherapy, photodynamic therapy, and heat therapy may aid in the healing process.5 Systemic azole antifungal medications, miltefosine, and amphotericin B, and pentamidine may be used for more persistent lesions. In very severe cases, pentavalent antimonials (sodium stibogluconate, Pentostam) may be administered intravenously, although there is a high occurrence of recorded side effects.2
This case and the photos were submitted by Sabrina Liao, BS, University of California, San Diego; and Brooke Resh Sateesh, MD, San Diego Family Dermatology The case was edited by Donna Bilu Martin, MD.
References
1. Leishmaniasis – Resources for Health Professionals. Centers for Disease Control and Prevention. 2021 Jun 3.
2. Stark CG. Leishmaniasis. Medscape. 2020 Feb 18.
3. Markle WH and Makhoul K. Am Fam Physician. 2004 Mar 15;69(6):1455-604.
4. Ngan V. Leishmaniasis. DermNet NZ. 2017 Jan. 7.
5. Sousa AQ et al. Am J Trop Med Hyg. 2014 Nov;91(5):905-7.
Trypanosomatidae
Leishmaniasis is caused by protozoa of the family Trypanosomatidae, called Leishmania. The vector is a sandfly infected with the protozoa.1
The three main forms of leishmaniasis – cutaneous, mucocutaneous, or visceral – varies with the species of organism involved, the geographic distribution, and the immune response of the patient. A majority of the cases seen in the United States are from patients who contracted the disease elsewhere, particularly from Peru and Brazil.2
Lesions can vary from asymptomatic to severe. The initial lesion typically develops within weeks or months, and presents as an erythematous papule that is seen at the bite site.3 The papule evolves into a nodule or plaque that may ulcerate and crust.3 The ulcer can be distinguished by a raised and distinct border. In older stages, atrophic scarring may be seen. In some cases, the lesions may present years after exposure, because of immunosuppression or trauma.
Histology of CL reveals tuberculoid granulomas with parasitized histiocytes present. Amastigotes with distinct nuclei and kinetoplasts characterize Leishmania.2 In addition to histology, the biopsy may be sent for the press-imprint-smear method (PIS). In a study of 75 patients, the PIS method showed a higher sensitivity, as well as being a less costly and more rapid option for diagnosis.5
The treatment depends on the severity of the lesion and the species of the Leishmania genus. Mild lesions may resolve spontaneously. Topical imiquimod, cryotherapy, photodynamic therapy, and heat therapy may aid in the healing process.5 Systemic azole antifungal medications, miltefosine, and amphotericin B, and pentamidine may be used for more persistent lesions. In very severe cases, pentavalent antimonials (sodium stibogluconate, Pentostam) may be administered intravenously, although there is a high occurrence of recorded side effects.2
This case and the photos were submitted by Sabrina Liao, BS, University of California, San Diego; and Brooke Resh Sateesh, MD, San Diego Family Dermatology The case was edited by Donna Bilu Martin, MD.
References
1. Leishmaniasis – Resources for Health Professionals. Centers for Disease Control and Prevention. 2021 Jun 3.
2. Stark CG. Leishmaniasis. Medscape. 2020 Feb 18.
3. Markle WH and Makhoul K. Am Fam Physician. 2004 Mar 15;69(6):1455-604.
4. Ngan V. Leishmaniasis. DermNet NZ. 2017 Jan. 7.
5. Sousa AQ et al. Am J Trop Med Hyg. 2014 Nov;91(5):905-7.
Children and COVID: New vaccinations drop as the case count rises
With only a quarter of all children aged 12-15 years fully vaccinated against COVID-19, first vaccinations continued to drop and new cases for all children rose for the second consecutive week.
Just under 25% of children aged 12-15 had completed the vaccine regimen as of July 12, and just over one-third (33.5%) had received at least one dose. Meanwhile, that age group represented 11.5% of people who initiated vaccination during the 2 weeks ending July 12, down from 12.1% a week earlier, the Centers for Disease Control and Prevention said. The total number of new vaccinations for the week ending July 12 was just over 201,000, compared with 307,000 for the previous week.
New cases of COVID-19, however, were on the rise in children. The 19,000 new cases reported for the week ending July 8 were up from 12,000 a week earlier and 8,000 the week before that, according to a report from the American Academy of Pediatrics and the Children’s Hospital Association.
That report also shows that children made up 22.3% of all new cases during the week of July 2-8, compared with 16.8% the previous week, and that there were nine deaths in children that same week, the most since March. COVID-related deaths among children total 344 in the 46 jurisdictions (43 states, New York City, Puerto Rico, and Guam) that are reporting such data by age. “It is not possible to standardize more detailed age ranges for children based on what is publicly available from the states,” the two groups noted.
Such data are available from the CDC’s COVID Data Tracker, however, and they show that children aged 16-17 years, who became eligible for COVID vaccination before the younger age group, are further ahead in the process. Among the older children, almost 46% had gotten at least one dose and 37% were fully vaccinated by July 12.
With only a quarter of all children aged 12-15 years fully vaccinated against COVID-19, first vaccinations continued to drop and new cases for all children rose for the second consecutive week.
Just under 25% of children aged 12-15 had completed the vaccine regimen as of July 12, and just over one-third (33.5%) had received at least one dose. Meanwhile, that age group represented 11.5% of people who initiated vaccination during the 2 weeks ending July 12, down from 12.1% a week earlier, the Centers for Disease Control and Prevention said. The total number of new vaccinations for the week ending July 12 was just over 201,000, compared with 307,000 for the previous week.
New cases of COVID-19, however, were on the rise in children. The 19,000 new cases reported for the week ending July 8 were up from 12,000 a week earlier and 8,000 the week before that, according to a report from the American Academy of Pediatrics and the Children’s Hospital Association.
That report also shows that children made up 22.3% of all new cases during the week of July 2-8, compared with 16.8% the previous week, and that there were nine deaths in children that same week, the most since March. COVID-related deaths among children total 344 in the 46 jurisdictions (43 states, New York City, Puerto Rico, and Guam) that are reporting such data by age. “It is not possible to standardize more detailed age ranges for children based on what is publicly available from the states,” the two groups noted.
Such data are available from the CDC’s COVID Data Tracker, however, and they show that children aged 16-17 years, who became eligible for COVID vaccination before the younger age group, are further ahead in the process. Among the older children, almost 46% had gotten at least one dose and 37% were fully vaccinated by July 12.
With only a quarter of all children aged 12-15 years fully vaccinated against COVID-19, first vaccinations continued to drop and new cases for all children rose for the second consecutive week.
Just under 25% of children aged 12-15 had completed the vaccine regimen as of July 12, and just over one-third (33.5%) had received at least one dose. Meanwhile, that age group represented 11.5% of people who initiated vaccination during the 2 weeks ending July 12, down from 12.1% a week earlier, the Centers for Disease Control and Prevention said. The total number of new vaccinations for the week ending July 12 was just over 201,000, compared with 307,000 for the previous week.
New cases of COVID-19, however, were on the rise in children. The 19,000 new cases reported for the week ending July 8 were up from 12,000 a week earlier and 8,000 the week before that, according to a report from the American Academy of Pediatrics and the Children’s Hospital Association.
That report also shows that children made up 22.3% of all new cases during the week of July 2-8, compared with 16.8% the previous week, and that there were nine deaths in children that same week, the most since March. COVID-related deaths among children total 344 in the 46 jurisdictions (43 states, New York City, Puerto Rico, and Guam) that are reporting such data by age. “It is not possible to standardize more detailed age ranges for children based on what is publicly available from the states,” the two groups noted.
Such data are available from the CDC’s COVID Data Tracker, however, and they show that children aged 16-17 years, who became eligible for COVID vaccination before the younger age group, are further ahead in the process. Among the older children, almost 46% had gotten at least one dose and 37% were fully vaccinated by July 12.
Standard medical mask can protect wearer from aerosols
A standard medical face mask is more effective at preventing the wearer from inhaling aerosols without causing substantial breathing resistance than various cloth, medical, or respirator masks, new research shows.
“Medical face masks with good filtration efficacies can provide even better protective effects than KN95 respirators,” Christian Sterr, MD, from Philipps University of Marburg (Germany), and colleagues wrote. “FFP2 respirators, on the other hand, could be useful in high-risk situations but require greater breathing effort and therefore physical stress for users.”
Extensive evidence has shown that face masks are an excellent form of source control, preventing infectious people from spreading the SARS-CoV-2 virus into the environment. But evidence has been less clear about how well masks protect the wearer from inhaling particles containing the virus.
The researchers conducted three experiments to test 32 different face masks. The findings were presented at the 31st European Congress of Clinical Microbiology & Infectious Diseases and published online in PLOS One .
First they tested pressure drop, which “relates to how easily air can pass through the material,” said Chris Cappa, PhD, professor of civil and environmental engineering at the University of California, Davis, who was not involved with the study.
“Higher pressure drops mean that there is greater resistance to the air passing through. A higher pressure drop will typically mean breathing through the material will be slightly more challenging, compared to a low pressure drop. There is no relationship between pressure drop and the mask effectiveness,” he said in an interview.
Pressure drop was lowest with type II medical face masks, the typical three-ply surgical masks designed to stop large particles expelled by the wearer from entering the environment, was highest with respirators, including KN95 and FFP2 masks, and varied with the different cloth masks tested.
Next the researchers compared filtration efficacy, which “refers to how well the material removes particles from the air that passes through the mask material,” Dr. Cappa explained. They did this by placing each mask over the opening to an air collector that measured how many particles got through. “A mask that has 100% filtration efficacy will remove all particles from the air that passes through it and 0% means that no particles are removed.”
Cloth masks had the lowest filtration efficacy, at 28%. Certified face masks that met European Standards had a relatively high efficacy, at 70%; for uncertified face masks, filtration efficacy was 63%. As expected, KN95 and FFP2 masks had the highest filtration efficacy, at 94% and 98%, respectively.Finally, the researchers tested as-worn filtration efficacies. They placed each mask on a dummy head with an artificial airway that collected airborne particles. They then pumped a mixture of aerosol particles – ranging in size from 0.3 to 2.0 mcm – and particle-free pressurized air into the air-proof acrylic chamber in which the head was placed.
In this experiment, cloth masks and noncertified face masks were least effective, filtering less than 20% of aerosols. Interestingly, the cloth face mask with the highest filtration on its own (84%) had the lowest filtration efficacy (9%), apparently because of its very high pressure drop (breathing resistance). When more effort is required to breathe through a mask, more air can bypass the filtration system.
Type II medical face masks, however, filtered 47% of aerosols, KN95 masks filtered 41%, and FFP2 masks filtered 65%. Face shields did not prevent the inhalation of any aerosols.
“We know that face shields will only be effective in stopping very large droplets, essentially visible spittle,” Dr. Cappa explained. “Most of the particles that we exhale will travel right around a face shield.”
The “optimal mask effect is a combination of high filter performance and low filter resistance,” which applies to most of the FFP2 and medical type II face masks tested, Dr. Sterr and colleagues wrote. “The type II medical masks in our random sample showed very good as-worn filtration performances with a low additional work of breathing at the same time.”
Although this study showed how well different masks filtered out particles, it could not assess how well different masks prevent actual infection.
“Like any virus, SARS-CoV-2 can only infect people as long as it is viable,” the researchers wrote. “Moreover, a certain number of viable virus particles need to be inhaled to trigger an infection. Thus, the assessed filtration efficacy may differ from the provided protection rate against SARS-CoV-2.”
In addition, particles containing the virus could dry out while going through the mask and become less infectious. “Even a small reduction in inhaled particles might prevent infection or at least lead to a less severe infection,” they noted.
In fact, filtration efficacy does not necessarily indicate how well the mask filters out particles while being worn. “This might be due to the combined effects of mask fit and pressure drop of the mask material and therefore tendency for mask leakage,” the team wrote. “High pressure drop results in higher breathing resistance and therefore supports leakage, especially if combined to a loosely fitting mask.”
These findings are “in line with what we already knew,” Dr. Cappa explained. “Even if the mask material filters out nearly all particles that pass through it, as is the case for high-efficiency masks such as N95 and FFP2, if the mask does not fit well, then it will only provide moderate protection for the wearer.”
Although the findings reaffirm the different levels of filtration provided by various cloth masks, they do not “provide any guidance on which types of cloth masks are better or worse,” he said. But they do show that “medical face masks will generally provide more protection to the wearer.”
It’s not surprising that face shields offer little protection from aerosols, Dr. Cappa said, but they can provide added protection when worn with a mask.
“A face shield could prevent large droplets that might shoot out when a person coughs or sneezes from depositing on a person’s eye,” he pointed out. And it can help “redirect the plume of particles that an infected person exhales, which could be useful in close quarters. However, even then those particles will keep moving around and could be inhaled. A mask can really help to decrease the amount inhaled.”
The study did not use external funding. The authors and Dr. Cappa disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
A standard medical face mask is more effective at preventing the wearer from inhaling aerosols without causing substantial breathing resistance than various cloth, medical, or respirator masks, new research shows.
“Medical face masks with good filtration efficacies can provide even better protective effects than KN95 respirators,” Christian Sterr, MD, from Philipps University of Marburg (Germany), and colleagues wrote. “FFP2 respirators, on the other hand, could be useful in high-risk situations but require greater breathing effort and therefore physical stress for users.”
Extensive evidence has shown that face masks are an excellent form of source control, preventing infectious people from spreading the SARS-CoV-2 virus into the environment. But evidence has been less clear about how well masks protect the wearer from inhaling particles containing the virus.
The researchers conducted three experiments to test 32 different face masks. The findings were presented at the 31st European Congress of Clinical Microbiology & Infectious Diseases and published online in PLOS One .
First they tested pressure drop, which “relates to how easily air can pass through the material,” said Chris Cappa, PhD, professor of civil and environmental engineering at the University of California, Davis, who was not involved with the study.
“Higher pressure drops mean that there is greater resistance to the air passing through. A higher pressure drop will typically mean breathing through the material will be slightly more challenging, compared to a low pressure drop. There is no relationship between pressure drop and the mask effectiveness,” he said in an interview.
Pressure drop was lowest with type II medical face masks, the typical three-ply surgical masks designed to stop large particles expelled by the wearer from entering the environment, was highest with respirators, including KN95 and FFP2 masks, and varied with the different cloth masks tested.
Next the researchers compared filtration efficacy, which “refers to how well the material removes particles from the air that passes through the mask material,” Dr. Cappa explained. They did this by placing each mask over the opening to an air collector that measured how many particles got through. “A mask that has 100% filtration efficacy will remove all particles from the air that passes through it and 0% means that no particles are removed.”
Cloth masks had the lowest filtration efficacy, at 28%. Certified face masks that met European Standards had a relatively high efficacy, at 70%; for uncertified face masks, filtration efficacy was 63%. As expected, KN95 and FFP2 masks had the highest filtration efficacy, at 94% and 98%, respectively.Finally, the researchers tested as-worn filtration efficacies. They placed each mask on a dummy head with an artificial airway that collected airborne particles. They then pumped a mixture of aerosol particles – ranging in size from 0.3 to 2.0 mcm – and particle-free pressurized air into the air-proof acrylic chamber in which the head was placed.
In this experiment, cloth masks and noncertified face masks were least effective, filtering less than 20% of aerosols. Interestingly, the cloth face mask with the highest filtration on its own (84%) had the lowest filtration efficacy (9%), apparently because of its very high pressure drop (breathing resistance). When more effort is required to breathe through a mask, more air can bypass the filtration system.
Type II medical face masks, however, filtered 47% of aerosols, KN95 masks filtered 41%, and FFP2 masks filtered 65%. Face shields did not prevent the inhalation of any aerosols.
“We know that face shields will only be effective in stopping very large droplets, essentially visible spittle,” Dr. Cappa explained. “Most of the particles that we exhale will travel right around a face shield.”
The “optimal mask effect is a combination of high filter performance and low filter resistance,” which applies to most of the FFP2 and medical type II face masks tested, Dr. Sterr and colleagues wrote. “The type II medical masks in our random sample showed very good as-worn filtration performances with a low additional work of breathing at the same time.”
Although this study showed how well different masks filtered out particles, it could not assess how well different masks prevent actual infection.
“Like any virus, SARS-CoV-2 can only infect people as long as it is viable,” the researchers wrote. “Moreover, a certain number of viable virus particles need to be inhaled to trigger an infection. Thus, the assessed filtration efficacy may differ from the provided protection rate against SARS-CoV-2.”
In addition, particles containing the virus could dry out while going through the mask and become less infectious. “Even a small reduction in inhaled particles might prevent infection or at least lead to a less severe infection,” they noted.
In fact, filtration efficacy does not necessarily indicate how well the mask filters out particles while being worn. “This might be due to the combined effects of mask fit and pressure drop of the mask material and therefore tendency for mask leakage,” the team wrote. “High pressure drop results in higher breathing resistance and therefore supports leakage, especially if combined to a loosely fitting mask.”
These findings are “in line with what we already knew,” Dr. Cappa explained. “Even if the mask material filters out nearly all particles that pass through it, as is the case for high-efficiency masks such as N95 and FFP2, if the mask does not fit well, then it will only provide moderate protection for the wearer.”
Although the findings reaffirm the different levels of filtration provided by various cloth masks, they do not “provide any guidance on which types of cloth masks are better or worse,” he said. But they do show that “medical face masks will generally provide more protection to the wearer.”
It’s not surprising that face shields offer little protection from aerosols, Dr. Cappa said, but they can provide added protection when worn with a mask.
“A face shield could prevent large droplets that might shoot out when a person coughs or sneezes from depositing on a person’s eye,” he pointed out. And it can help “redirect the plume of particles that an infected person exhales, which could be useful in close quarters. However, even then those particles will keep moving around and could be inhaled. A mask can really help to decrease the amount inhaled.”
The study did not use external funding. The authors and Dr. Cappa disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
A standard medical face mask is more effective at preventing the wearer from inhaling aerosols without causing substantial breathing resistance than various cloth, medical, or respirator masks, new research shows.
“Medical face masks with good filtration efficacies can provide even better protective effects than KN95 respirators,” Christian Sterr, MD, from Philipps University of Marburg (Germany), and colleagues wrote. “FFP2 respirators, on the other hand, could be useful in high-risk situations but require greater breathing effort and therefore physical stress for users.”
Extensive evidence has shown that face masks are an excellent form of source control, preventing infectious people from spreading the SARS-CoV-2 virus into the environment. But evidence has been less clear about how well masks protect the wearer from inhaling particles containing the virus.
The researchers conducted three experiments to test 32 different face masks. The findings were presented at the 31st European Congress of Clinical Microbiology & Infectious Diseases and published online in PLOS One .
First they tested pressure drop, which “relates to how easily air can pass through the material,” said Chris Cappa, PhD, professor of civil and environmental engineering at the University of California, Davis, who was not involved with the study.
“Higher pressure drops mean that there is greater resistance to the air passing through. A higher pressure drop will typically mean breathing through the material will be slightly more challenging, compared to a low pressure drop. There is no relationship between pressure drop and the mask effectiveness,” he said in an interview.
Pressure drop was lowest with type II medical face masks, the typical three-ply surgical masks designed to stop large particles expelled by the wearer from entering the environment, was highest with respirators, including KN95 and FFP2 masks, and varied with the different cloth masks tested.
Next the researchers compared filtration efficacy, which “refers to how well the material removes particles from the air that passes through the mask material,” Dr. Cappa explained. They did this by placing each mask over the opening to an air collector that measured how many particles got through. “A mask that has 100% filtration efficacy will remove all particles from the air that passes through it and 0% means that no particles are removed.”
Cloth masks had the lowest filtration efficacy, at 28%. Certified face masks that met European Standards had a relatively high efficacy, at 70%; for uncertified face masks, filtration efficacy was 63%. As expected, KN95 and FFP2 masks had the highest filtration efficacy, at 94% and 98%, respectively.Finally, the researchers tested as-worn filtration efficacies. They placed each mask on a dummy head with an artificial airway that collected airborne particles. They then pumped a mixture of aerosol particles – ranging in size from 0.3 to 2.0 mcm – and particle-free pressurized air into the air-proof acrylic chamber in which the head was placed.
In this experiment, cloth masks and noncertified face masks were least effective, filtering less than 20% of aerosols. Interestingly, the cloth face mask with the highest filtration on its own (84%) had the lowest filtration efficacy (9%), apparently because of its very high pressure drop (breathing resistance). When more effort is required to breathe through a mask, more air can bypass the filtration system.
Type II medical face masks, however, filtered 47% of aerosols, KN95 masks filtered 41%, and FFP2 masks filtered 65%. Face shields did not prevent the inhalation of any aerosols.
“We know that face shields will only be effective in stopping very large droplets, essentially visible spittle,” Dr. Cappa explained. “Most of the particles that we exhale will travel right around a face shield.”
The “optimal mask effect is a combination of high filter performance and low filter resistance,” which applies to most of the FFP2 and medical type II face masks tested, Dr. Sterr and colleagues wrote. “The type II medical masks in our random sample showed very good as-worn filtration performances with a low additional work of breathing at the same time.”
Although this study showed how well different masks filtered out particles, it could not assess how well different masks prevent actual infection.
“Like any virus, SARS-CoV-2 can only infect people as long as it is viable,” the researchers wrote. “Moreover, a certain number of viable virus particles need to be inhaled to trigger an infection. Thus, the assessed filtration efficacy may differ from the provided protection rate against SARS-CoV-2.”
In addition, particles containing the virus could dry out while going through the mask and become less infectious. “Even a small reduction in inhaled particles might prevent infection or at least lead to a less severe infection,” they noted.
In fact, filtration efficacy does not necessarily indicate how well the mask filters out particles while being worn. “This might be due to the combined effects of mask fit and pressure drop of the mask material and therefore tendency for mask leakage,” the team wrote. “High pressure drop results in higher breathing resistance and therefore supports leakage, especially if combined to a loosely fitting mask.”
These findings are “in line with what we already knew,” Dr. Cappa explained. “Even if the mask material filters out nearly all particles that pass through it, as is the case for high-efficiency masks such as N95 and FFP2, if the mask does not fit well, then it will only provide moderate protection for the wearer.”
Although the findings reaffirm the different levels of filtration provided by various cloth masks, they do not “provide any guidance on which types of cloth masks are better or worse,” he said. But they do show that “medical face masks will generally provide more protection to the wearer.”
It’s not surprising that face shields offer little protection from aerosols, Dr. Cappa said, but they can provide added protection when worn with a mask.
“A face shield could prevent large droplets that might shoot out when a person coughs or sneezes from depositing on a person’s eye,” he pointed out. And it can help “redirect the plume of particles that an infected person exhales, which could be useful in close quarters. However, even then those particles will keep moving around and could be inhaled. A mask can really help to decrease the amount inhaled.”
The study did not use external funding. The authors and Dr. Cappa disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Respiratory infection– and asthma-prone children
Some children are more susceptible to viral and bacterial respiratory infections in the first few years of life than others. However, the factors contributing to this susceptibility are incompletely understood. The pathogenesis, development, severity, and clinical outcomes of respiratory infections are largely dependent on the resident composition of the nasopharyngeal microbiome and immune defense.1
Respiratory infections caused by bacteria and/or viruses are a leading cause of death in children in the United States and worldwide. The well-recognized, predominant causative bacteria are Streptococcus pneumoniae (pneumococcus), nontypeable Haemophilus influenzae (Hflu), and Moraxella catarrhalis (Mcat). Respiratory infections caused by these pathogens result in considerable morbidity, mortality, and account for high health care costs. The clinical and laboratory group that I lead in Rochester, N.Y., has been studying acute otitis media (AOM) etiology, epidemiology, pathogenesis, prevention, and treatment for over 3 decades. Our research findings are likely applicable and generalizable to understanding the pathogenesis and immune response to other infectious diseases induced by pneumococcus, Hflu, and Mcat since they are also key pathogens causing sinusitis and lung infections.
Previous immunologic analysis of children with AOM by our group provided clarity in differences between infection-prone children manifest as otitis prone (OP; often referred to in our publications as stringently defined OP because of the stringent diagnostic requirement of tympanocentesis-proven etiology of infection) and non-OP children. We showed that about 90% of OP children have deficient immune responses following nasopharyngeal colonization and AOM, demonstrated by inadequate innate responses and adaptive immune responses.2 Many of these children also showed an increased propensity to viral upper respiratory infection and 30% fail to produce protective antibody responses after injection of routine pediatric vaccines.3,4
In this column, I want to share new information regarding differences in the nasopharyngeal microbiome of children who are respiratory infection prone versus those who are non–respiratory infection prone and children with asthma versus those who do not exhibit that clinical phenotype. We performed a retrospective analysis of clinical samples collected from 358 children, aged 6 months to 5 years, from our prospectively enrolled cohort in Rochester, N.Y., to determine associations between AOM and other childhood respiratory illnesses and nasopharyngeal microbiota. In order to define subgroups of children within the cohort, we used a statistical method called unsupervised clustering analysis to see if relatively unique groups of children could be discerned. The overall cohort successfully clustered into two groups, showing marked differences in the prevalence of respiratory infections and asthma.5 We termed the two clinical phenotypes infection and asthma prone (n = 99, 28% of the children) and non–infection and asthma prone (n = 259, 72% of the children). Infection- and asthma-prone children were significantly more likely to experience recurrent AOM, influenza, sinusitis, pneumonia, asthma, and allergic rhinitis, compared with non–infection- and asthma-prone children (Figure).
The two groups did not experience significantly different rates of eczema, food allergy, skin infections, urinary tract infections, or acute gastroenteritis, suggesting a common thread involving the respiratory tract that did not cross over to the gastrointestinal, skin, or urinary tract. We found that age at first nasopharyngeal colonization with any of the three bacterial respiratory pathogens (pneumococcus, Hflu, or Mcat) was significantly associated with the respiratory infection– and asthma-prone clinical phenotype. Specifically, respiratory infection– and asthma-prone children experienced colonization at a significantly earlier age than nonprone children did for all three bacteria. In an analysis of individual conditions, early Mcat colonization significantly associated with pneumonia, sinusitis, and asthma susceptibility; Hflu with pneumonia, sinusitis, influenza, and allergic rhinitis; and pneumococcus with sinusitis.
Since early colonization with the three bacterial respiratory pathogens was strongly associated with respiratory illnesses and asthma, nasopharyngeal microbiome analysis was performed on an available subset of samples. Bacterial diversity trended lower in infection- and asthma-prone children, consistent with dysbiosis in the respiratory infection– and asthma-prone clinical phenotype. Nine different bacteria genera were found to be differentially abundant when comparing respiratory infection– and asthma-prone and nonprone children, pointing the way to possible interventions to make the respiratory infection– and asthma-prone child nasopharyngeal microbiome more like the nonprone child.
As I have written previously in this column, recent accumulating data have shed light on the importance of the human microbiome in modulating immune homeostasis and disease susceptibility.6 My group is working toward generating new knowledge for the long-term goal of identifying new therapeutic strategies to facilitate a protective, diverse nasopharyngeal microbiome (with appropriately tuned intranasal probiotics) to prevent respiratory pathogen colonization and/or subsequent progression to respiratory infection and asthma. Also, vaccines directed against colonization-enhancing members of the microbiome may provide a means to indirectly control respiratory pathogen nasopharyngeal colonization.
Dr. Pichichero is a specialist in pediatric infectious diseases and director of the Research Institute at Rochester (N.Y.) General Hospital. He has no conflicts to declare. Contact him at [email protected]
References
1. Man WH et al. Nat Rev Microbiol. 2017;15(5):259-70.
2. Pichichero ME. J Infect. 2020;80(6):614-22.
3. Ren D et al. Clin Infect Dis. 2019;68(9):1566-74.
4. Pichichero ME et al. Pediatr Infect Dis J. 2013;32(11):1163-8.
5. Chapman T et al. PLoS One. 2020 Dec 11;15(12).
6. Blaser MJ. The microbiome revolution. J Clin Invest. 2014;124:4162-5.
Some children are more susceptible to viral and bacterial respiratory infections in the first few years of life than others. However, the factors contributing to this susceptibility are incompletely understood. The pathogenesis, development, severity, and clinical outcomes of respiratory infections are largely dependent on the resident composition of the nasopharyngeal microbiome and immune defense.1
Respiratory infections caused by bacteria and/or viruses are a leading cause of death in children in the United States and worldwide. The well-recognized, predominant causative bacteria are Streptococcus pneumoniae (pneumococcus), nontypeable Haemophilus influenzae (Hflu), and Moraxella catarrhalis (Mcat). Respiratory infections caused by these pathogens result in considerable morbidity, mortality, and account for high health care costs. The clinical and laboratory group that I lead in Rochester, N.Y., has been studying acute otitis media (AOM) etiology, epidemiology, pathogenesis, prevention, and treatment for over 3 decades. Our research findings are likely applicable and generalizable to understanding the pathogenesis and immune response to other infectious diseases induced by pneumococcus, Hflu, and Mcat since they are also key pathogens causing sinusitis and lung infections.
Previous immunologic analysis of children with AOM by our group provided clarity in differences between infection-prone children manifest as otitis prone (OP; often referred to in our publications as stringently defined OP because of the stringent diagnostic requirement of tympanocentesis-proven etiology of infection) and non-OP children. We showed that about 90% of OP children have deficient immune responses following nasopharyngeal colonization and AOM, demonstrated by inadequate innate responses and adaptive immune responses.2 Many of these children also showed an increased propensity to viral upper respiratory infection and 30% fail to produce protective antibody responses after injection of routine pediatric vaccines.3,4
In this column, I want to share new information regarding differences in the nasopharyngeal microbiome of children who are respiratory infection prone versus those who are non–respiratory infection prone and children with asthma versus those who do not exhibit that clinical phenotype. We performed a retrospective analysis of clinical samples collected from 358 children, aged 6 months to 5 years, from our prospectively enrolled cohort in Rochester, N.Y., to determine associations between AOM and other childhood respiratory illnesses and nasopharyngeal microbiota. In order to define subgroups of children within the cohort, we used a statistical method called unsupervised clustering analysis to see if relatively unique groups of children could be discerned. The overall cohort successfully clustered into two groups, showing marked differences in the prevalence of respiratory infections and asthma.5 We termed the two clinical phenotypes infection and asthma prone (n = 99, 28% of the children) and non–infection and asthma prone (n = 259, 72% of the children). Infection- and asthma-prone children were significantly more likely to experience recurrent AOM, influenza, sinusitis, pneumonia, asthma, and allergic rhinitis, compared with non–infection- and asthma-prone children (Figure).
The two groups did not experience significantly different rates of eczema, food allergy, skin infections, urinary tract infections, or acute gastroenteritis, suggesting a common thread involving the respiratory tract that did not cross over to the gastrointestinal, skin, or urinary tract. We found that age at first nasopharyngeal colonization with any of the three bacterial respiratory pathogens (pneumococcus, Hflu, or Mcat) was significantly associated with the respiratory infection– and asthma-prone clinical phenotype. Specifically, respiratory infection– and asthma-prone children experienced colonization at a significantly earlier age than nonprone children did for all three bacteria. In an analysis of individual conditions, early Mcat colonization significantly associated with pneumonia, sinusitis, and asthma susceptibility; Hflu with pneumonia, sinusitis, influenza, and allergic rhinitis; and pneumococcus with sinusitis.
Since early colonization with the three bacterial respiratory pathogens was strongly associated with respiratory illnesses and asthma, nasopharyngeal microbiome analysis was performed on an available subset of samples. Bacterial diversity trended lower in infection- and asthma-prone children, consistent with dysbiosis in the respiratory infection– and asthma-prone clinical phenotype. Nine different bacteria genera were found to be differentially abundant when comparing respiratory infection– and asthma-prone and nonprone children, pointing the way to possible interventions to make the respiratory infection– and asthma-prone child nasopharyngeal microbiome more like the nonprone child.
As I have written previously in this column, recent accumulating data have shed light on the importance of the human microbiome in modulating immune homeostasis and disease susceptibility.6 My group is working toward generating new knowledge for the long-term goal of identifying new therapeutic strategies to facilitate a protective, diverse nasopharyngeal microbiome (with appropriately tuned intranasal probiotics) to prevent respiratory pathogen colonization and/or subsequent progression to respiratory infection and asthma. Also, vaccines directed against colonization-enhancing members of the microbiome may provide a means to indirectly control respiratory pathogen nasopharyngeal colonization.
Dr. Pichichero is a specialist in pediatric infectious diseases and director of the Research Institute at Rochester (N.Y.) General Hospital. He has no conflicts to declare. Contact him at [email protected]
References
1. Man WH et al. Nat Rev Microbiol. 2017;15(5):259-70.
2. Pichichero ME. J Infect. 2020;80(6):614-22.
3. Ren D et al. Clin Infect Dis. 2019;68(9):1566-74.
4. Pichichero ME et al. Pediatr Infect Dis J. 2013;32(11):1163-8.
5. Chapman T et al. PLoS One. 2020 Dec 11;15(12).
6. Blaser MJ. The microbiome revolution. J Clin Invest. 2014;124:4162-5.
Some children are more susceptible to viral and bacterial respiratory infections in the first few years of life than others. However, the factors contributing to this susceptibility are incompletely understood. The pathogenesis, development, severity, and clinical outcomes of respiratory infections are largely dependent on the resident composition of the nasopharyngeal microbiome and immune defense.1
Respiratory infections caused by bacteria and/or viruses are a leading cause of death in children in the United States and worldwide. The well-recognized, predominant causative bacteria are Streptococcus pneumoniae (pneumococcus), nontypeable Haemophilus influenzae (Hflu), and Moraxella catarrhalis (Mcat). Respiratory infections caused by these pathogens result in considerable morbidity, mortality, and account for high health care costs. The clinical and laboratory group that I lead in Rochester, N.Y., has been studying acute otitis media (AOM) etiology, epidemiology, pathogenesis, prevention, and treatment for over 3 decades. Our research findings are likely applicable and generalizable to understanding the pathogenesis and immune response to other infectious diseases induced by pneumococcus, Hflu, and Mcat since they are also key pathogens causing sinusitis and lung infections.
Previous immunologic analysis of children with AOM by our group provided clarity in differences between infection-prone children manifest as otitis prone (OP; often referred to in our publications as stringently defined OP because of the stringent diagnostic requirement of tympanocentesis-proven etiology of infection) and non-OP children. We showed that about 90% of OP children have deficient immune responses following nasopharyngeal colonization and AOM, demonstrated by inadequate innate responses and adaptive immune responses.2 Many of these children also showed an increased propensity to viral upper respiratory infection and 30% fail to produce protective antibody responses after injection of routine pediatric vaccines.3,4
In this column, I want to share new information regarding differences in the nasopharyngeal microbiome of children who are respiratory infection prone versus those who are non–respiratory infection prone and children with asthma versus those who do not exhibit that clinical phenotype. We performed a retrospective analysis of clinical samples collected from 358 children, aged 6 months to 5 years, from our prospectively enrolled cohort in Rochester, N.Y., to determine associations between AOM and other childhood respiratory illnesses and nasopharyngeal microbiota. In order to define subgroups of children within the cohort, we used a statistical method called unsupervised clustering analysis to see if relatively unique groups of children could be discerned. The overall cohort successfully clustered into two groups, showing marked differences in the prevalence of respiratory infections and asthma.5 We termed the two clinical phenotypes infection and asthma prone (n = 99, 28% of the children) and non–infection and asthma prone (n = 259, 72% of the children). Infection- and asthma-prone children were significantly more likely to experience recurrent AOM, influenza, sinusitis, pneumonia, asthma, and allergic rhinitis, compared with non–infection- and asthma-prone children (Figure).
The two groups did not experience significantly different rates of eczema, food allergy, skin infections, urinary tract infections, or acute gastroenteritis, suggesting a common thread involving the respiratory tract that did not cross over to the gastrointestinal, skin, or urinary tract. We found that age at first nasopharyngeal colonization with any of the three bacterial respiratory pathogens (pneumococcus, Hflu, or Mcat) was significantly associated with the respiratory infection– and asthma-prone clinical phenotype. Specifically, respiratory infection– and asthma-prone children experienced colonization at a significantly earlier age than nonprone children did for all three bacteria. In an analysis of individual conditions, early Mcat colonization significantly associated with pneumonia, sinusitis, and asthma susceptibility; Hflu with pneumonia, sinusitis, influenza, and allergic rhinitis; and pneumococcus with sinusitis.
Since early colonization with the three bacterial respiratory pathogens was strongly associated with respiratory illnesses and asthma, nasopharyngeal microbiome analysis was performed on an available subset of samples. Bacterial diversity trended lower in infection- and asthma-prone children, consistent with dysbiosis in the respiratory infection– and asthma-prone clinical phenotype. Nine different bacteria genera were found to be differentially abundant when comparing respiratory infection– and asthma-prone and nonprone children, pointing the way to possible interventions to make the respiratory infection– and asthma-prone child nasopharyngeal microbiome more like the nonprone child.
As I have written previously in this column, recent accumulating data have shed light on the importance of the human microbiome in modulating immune homeostasis and disease susceptibility.6 My group is working toward generating new knowledge for the long-term goal of identifying new therapeutic strategies to facilitate a protective, diverse nasopharyngeal microbiome (with appropriately tuned intranasal probiotics) to prevent respiratory pathogen colonization and/or subsequent progression to respiratory infection and asthma. Also, vaccines directed against colonization-enhancing members of the microbiome may provide a means to indirectly control respiratory pathogen nasopharyngeal colonization.
Dr. Pichichero is a specialist in pediatric infectious diseases and director of the Research Institute at Rochester (N.Y.) General Hospital. He has no conflicts to declare. Contact him at [email protected]
References
1. Man WH et al. Nat Rev Microbiol. 2017;15(5):259-70.
2. Pichichero ME. J Infect. 2020;80(6):614-22.
3. Ren D et al. Clin Infect Dis. 2019;68(9):1566-74.
4. Pichichero ME et al. Pediatr Infect Dis J. 2013;32(11):1163-8.
5. Chapman T et al. PLoS One. 2020 Dec 11;15(12).
6. Blaser MJ. The microbiome revolution. J Clin Invest. 2014;124:4162-5.
‘Long haul’ COVID recovery worse than cancer rehab for some: CDC
People experiencing ongoing or “long-haul” symptoms after COVID-19 illness were more likely to report pain, challenges with physical activities, and “substantially worse health,” compared with people needing rehabilitation because of cancer, lead author Jessica Rogers-Brown, PhD, and colleagues report.
The study was published online July 9 in Morbidity and Mortality Weekly Report (MMWR).
The CDC investigators compared the self-reported physical and mental health symptoms, physical endurance, and use of health services of 1,295 outpatients recovering from COVID-19 and a control group of another 2,395 outpatients rehabilitating from a previous or current cancer diagnosis who had not experienced COVID-19.
Researchers used electronic health record data from January 2020 to March 2021 in the Select Medical network of outpatient clinics. The study included patients from 36 states and the District of Columbia.
Compared with people referred for cancer rehabilitation, those with COVID-19 symptoms lasting beyond 4 weeks were 2.3 times more likely to report pain, 1.8 times more likely to report worse physical health, and 1.6 times more likely to report difficulty with physical activities, an adjusted odds ratio analysis reveals.
The COVID-19 rehabilitation group also performed significantly worse on a 6-minute walk test, suggesting less physical endurance than people recovering from cancer (P < .001). They also used more rehabilitation services overall than the control group.
The researchers suggest services tailored to the unique physical and mental health rehabilitation needs of the post–COVID-19 patient population could be warranted.
The study does not suggest all people recovering with COVID-19 will fare worse than people recovering from cancer, the authors caution. They note that “these results should not be interpreted to mean that post–COVID-19 patients overall had poorer physical and mental health than patients with cancer.”
“Instead, results indicate that post–COVID-19 patients specifically referred to a large physical rehabilitation network had poorer health measures than those referred for cancer, which indicates that some patients recovering from COVID-19 had substantial rehabilitation needs.”
A version of this article first appeared on Medscape.com.
People experiencing ongoing or “long-haul” symptoms after COVID-19 illness were more likely to report pain, challenges with physical activities, and “substantially worse health,” compared with people needing rehabilitation because of cancer, lead author Jessica Rogers-Brown, PhD, and colleagues report.
The study was published online July 9 in Morbidity and Mortality Weekly Report (MMWR).
The CDC investigators compared the self-reported physical and mental health symptoms, physical endurance, and use of health services of 1,295 outpatients recovering from COVID-19 and a control group of another 2,395 outpatients rehabilitating from a previous or current cancer diagnosis who had not experienced COVID-19.
Researchers used electronic health record data from January 2020 to March 2021 in the Select Medical network of outpatient clinics. The study included patients from 36 states and the District of Columbia.
Compared with people referred for cancer rehabilitation, those with COVID-19 symptoms lasting beyond 4 weeks were 2.3 times more likely to report pain, 1.8 times more likely to report worse physical health, and 1.6 times more likely to report difficulty with physical activities, an adjusted odds ratio analysis reveals.
The COVID-19 rehabilitation group also performed significantly worse on a 6-minute walk test, suggesting less physical endurance than people recovering from cancer (P < .001). They also used more rehabilitation services overall than the control group.
The researchers suggest services tailored to the unique physical and mental health rehabilitation needs of the post–COVID-19 patient population could be warranted.
The study does not suggest all people recovering with COVID-19 will fare worse than people recovering from cancer, the authors caution. They note that “these results should not be interpreted to mean that post–COVID-19 patients overall had poorer physical and mental health than patients with cancer.”
“Instead, results indicate that post–COVID-19 patients specifically referred to a large physical rehabilitation network had poorer health measures than those referred for cancer, which indicates that some patients recovering from COVID-19 had substantial rehabilitation needs.”
A version of this article first appeared on Medscape.com.
People experiencing ongoing or “long-haul” symptoms after COVID-19 illness were more likely to report pain, challenges with physical activities, and “substantially worse health,” compared with people needing rehabilitation because of cancer, lead author Jessica Rogers-Brown, PhD, and colleagues report.
The study was published online July 9 in Morbidity and Mortality Weekly Report (MMWR).
The CDC investigators compared the self-reported physical and mental health symptoms, physical endurance, and use of health services of 1,295 outpatients recovering from COVID-19 and a control group of another 2,395 outpatients rehabilitating from a previous or current cancer diagnosis who had not experienced COVID-19.
Researchers used electronic health record data from January 2020 to March 2021 in the Select Medical network of outpatient clinics. The study included patients from 36 states and the District of Columbia.
Compared with people referred for cancer rehabilitation, those with COVID-19 symptoms lasting beyond 4 weeks were 2.3 times more likely to report pain, 1.8 times more likely to report worse physical health, and 1.6 times more likely to report difficulty with physical activities, an adjusted odds ratio analysis reveals.
The COVID-19 rehabilitation group also performed significantly worse on a 6-minute walk test, suggesting less physical endurance than people recovering from cancer (P < .001). They also used more rehabilitation services overall than the control group.
The researchers suggest services tailored to the unique physical and mental health rehabilitation needs of the post–COVID-19 patient population could be warranted.
The study does not suggest all people recovering with COVID-19 will fare worse than people recovering from cancer, the authors caution. They note that “these results should not be interpreted to mean that post–COVID-19 patients overall had poorer physical and mental health than patients with cancer.”
“Instead, results indicate that post–COVID-19 patients specifically referred to a large physical rehabilitation network had poorer health measures than those referred for cancer, which indicates that some patients recovering from COVID-19 had substantial rehabilitation needs.”
A version of this article first appeared on Medscape.com.
Clostridioides difficile: Two sets of guidelines disagree
With two sets of Clostridioides difficile recommendations being published within a month of each other, clinicians may find themselves trying to reconcile some of the conflicts between the two guidelines.
The first set, published June 1 by the American College of Gastroenterology, focuses on fecal microbiota transplantation (FMT) and the antibiotic vancomycin. The second, published June 24 by the Infectious Diseases Society of America and Society for Healthcare Epidemiology of America, drives a shift in treatment for initial episodes and short-term recurrence from vancomycin to fidaxomicin and, in some cases, adding on the monoclonal antibody bezlotoxumab, both made by Merck.
The updates are timely because researchers are now recognizing that C. difficile can colonize people without causing symptoms, David Johnson, MD, professor of medicine and chief of gastroenterology at the Eastern Virginia School of Medicine, Norfolk, said in an interview. He was not involved in writing either set of guidelines. “C. diff infection was a hospital-type infection, but we’re now seeing it in up to approximately 35%-50% of patients coming from the community, so it’s a big concern.”
Although the guidelines agree on which treatments are effective, the recommendations give the options a different emphasis.
Infectious disease specialist Stuart Johnson, MD, professor of medicine at Loyola University Medical Center in Maywood, Ill., and a physician researcher at Edward Hines Jr. Veterans Affairs Hospital in Hines, Ill., is the first author in the IDSA/SHEA guidelines. He told this news organization that one reason the two sets of recommendations may diverge in emphasis for initial and recurrent C. difficile is that “everyone has a different way of looking at things.” Compared with infectious disease specialists like him, he said, gastroenterologists “for the most part see the world a little different and have their own bent on things.”
The differences between the two guidelines relate to the first-line therapy for people with an initial or recurrent C. difficile episode. For an initial episode, the IDSA/SHEA authors conditionally recommend fidaxomicin as first preferred choice over vancomycin, with a moderate certainty of evidence. They noted that implementing this recommendation depends on “available resources,” a reference to the higher cost and difficulty of access associated with fidaxomicin.
Gastroenterologist Monika Fischer, MD, an associate professor of medicine at Indiana University, Indianapolis, is one of the authors of the ACG guidelines. She told this news organization that the cost difference between fidaxomicin and vancomycin is considerable and finds the choice to foreground fidaxomicin puzzling. “They did not reference any new data compared to those we have published.” Their recommendation may make sense in terms of efficacy, but real-world demands require attention to cost and reimbursement. “They themselves state this in their recommendations,” she noted.
Dr. Fischer cited a ballpark of about $100 for a course of vancomycin, compared with about $3,000 for a course of fidaxomicin. The IDSA/SHEA guidelines do cite vancomycin as an acceptable alternative. According to Dr. Fischer, the ACG guidelines authors discussed fidaxomicin and concluded that there just wasn’t enough evidence to justify favoring this antibiotic over vancomycin, given the cost-benefit imbalance. The ACG guidelines call for a standard course of oral vancomycin for a first, nonsevere C. difficile episode, listing oral fidaxomicin or oral metronidazole as alternatives.
For a recurrence, the IDSA/SHEA authors also favor fidaxomicin in a conditional recommendation over a standard course of vancomycin. For multiple recurrences, a tapered and pulsed vancomycin regimen, vancomycin followed by rifaximin, or FMT are also options.
Dr. David Johnson said that these recommendations favoring fidaxomicin are “surprising,” and that lower costs of vancomycin outweigh the benefit of fidaxomicin, given more-or-less comparable data on cure rates.
In contrast, the ACG guidelines recommend that an initial recurrence be treated with a tapering dose of vancomycin, and call for FMT for patients who are eligible and who experience a second or more C. difficile recurrences after a round of pulsed vancomycin.
Dr. Stuart Johnson said that FMT carries its own special set of issues. “If you don’t have a donor program set up, you have to rely on a stool bank,” noting that one widely used stool bank “basically had to stop making the product because of the coronavirus.” Costs for FMT products have doubled in recent years, and because Food and Drug Administration approval of the therapy is lacking, insurance does not cover it.
Dr. David Johnson also said that he is not “terribly happy” about the ACG recommendation for vancomycin prophylaxis. “It may help, but it also can have off-target effects against colonic bacterial flora, so we would not agree with that recommendation.”
The IDSA/SHEA authors also conditionally recommend bezlotoxumab, on very low certainty of evidence, as a cotherapy with standard of care antibiotics for recurrence prevention in patients with an episode in the last 6 months, particularly for patients at high recurrence risk “where logistics is not an issue.” The FDA has warned that this monoclonal antibody should be used with great care in patients with heart failure and only when benefits outweigh risks.
The ACG guidelines conditionally recommend considering bezlotoxumab to prevent recurrence in patients with specific risk factors, including age over 65 years and severe presentation. The IDSA/SHEA guidelines expand this population to anyone with a recurrence within 6 months, Dr. Fischer pointed out.
The antibody treatment “does offer another 10% absolute reduction in recurrent C. diff disease,” said Dr. Stuart Johnson, which is a “helpful option and primarily for people who have had recurrent C. diff already.” In general, he said, for both drugs, “access is still something we have to work with.”
In a commentary on the ACG guidelines, Dr. David Johnson wrote that there is good evidence that bezlotoxumab prevents relapse, especially in patients with specific risk factors. The hitch is the $4,500 price tag for a 1,000-mg vial, with a recommended dose of 10 mg/kg.
Dr. Stuart Johnson agreed that the costs of the fidaxomicin and bezlotoxumab are important considerations. In addition, there are logistical issues with using the antibody because most hospitals don’t offer infusions, which pushes patients to infusion centers.
Regardless, he added, “we’re happy that we have new options.”
Dr. Fischer, Dr. Stuart Johnson, and Dr. David Johnson reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
With two sets of Clostridioides difficile recommendations being published within a month of each other, clinicians may find themselves trying to reconcile some of the conflicts between the two guidelines.
The first set, published June 1 by the American College of Gastroenterology, focuses on fecal microbiota transplantation (FMT) and the antibiotic vancomycin. The second, published June 24 by the Infectious Diseases Society of America and Society for Healthcare Epidemiology of America, drives a shift in treatment for initial episodes and short-term recurrence from vancomycin to fidaxomicin and, in some cases, adding on the monoclonal antibody bezlotoxumab, both made by Merck.
The updates are timely because researchers are now recognizing that C. difficile can colonize people without causing symptoms, David Johnson, MD, professor of medicine and chief of gastroenterology at the Eastern Virginia School of Medicine, Norfolk, said in an interview. He was not involved in writing either set of guidelines. “C. diff infection was a hospital-type infection, but we’re now seeing it in up to approximately 35%-50% of patients coming from the community, so it’s a big concern.”
Although the guidelines agree on which treatments are effective, the recommendations give the options a different emphasis.
Infectious disease specialist Stuart Johnson, MD, professor of medicine at Loyola University Medical Center in Maywood, Ill., and a physician researcher at Edward Hines Jr. Veterans Affairs Hospital in Hines, Ill., is the first author in the IDSA/SHEA guidelines. He told this news organization that one reason the two sets of recommendations may diverge in emphasis for initial and recurrent C. difficile is that “everyone has a different way of looking at things.” Compared with infectious disease specialists like him, he said, gastroenterologists “for the most part see the world a little different and have their own bent on things.”
The differences between the two guidelines relate to the first-line therapy for people with an initial or recurrent C. difficile episode. For an initial episode, the IDSA/SHEA authors conditionally recommend fidaxomicin as first preferred choice over vancomycin, with a moderate certainty of evidence. They noted that implementing this recommendation depends on “available resources,” a reference to the higher cost and difficulty of access associated with fidaxomicin.
Gastroenterologist Monika Fischer, MD, an associate professor of medicine at Indiana University, Indianapolis, is one of the authors of the ACG guidelines. She told this news organization that the cost difference between fidaxomicin and vancomycin is considerable and finds the choice to foreground fidaxomicin puzzling. “They did not reference any new data compared to those we have published.” Their recommendation may make sense in terms of efficacy, but real-world demands require attention to cost and reimbursement. “They themselves state this in their recommendations,” she noted.
Dr. Fischer cited a ballpark of about $100 for a course of vancomycin, compared with about $3,000 for a course of fidaxomicin. The IDSA/SHEA guidelines do cite vancomycin as an acceptable alternative. According to Dr. Fischer, the ACG guidelines authors discussed fidaxomicin and concluded that there just wasn’t enough evidence to justify favoring this antibiotic over vancomycin, given the cost-benefit imbalance. The ACG guidelines call for a standard course of oral vancomycin for a first, nonsevere C. difficile episode, listing oral fidaxomicin or oral metronidazole as alternatives.
For a recurrence, the IDSA/SHEA authors also favor fidaxomicin in a conditional recommendation over a standard course of vancomycin. For multiple recurrences, a tapered and pulsed vancomycin regimen, vancomycin followed by rifaximin, or FMT are also options.
Dr. David Johnson said that these recommendations favoring fidaxomicin are “surprising,” and that lower costs of vancomycin outweigh the benefit of fidaxomicin, given more-or-less comparable data on cure rates.
In contrast, the ACG guidelines recommend that an initial recurrence be treated with a tapering dose of vancomycin, and call for FMT for patients who are eligible and who experience a second or more C. difficile recurrences after a round of pulsed vancomycin.
Dr. Stuart Johnson said that FMT carries its own special set of issues. “If you don’t have a donor program set up, you have to rely on a stool bank,” noting that one widely used stool bank “basically had to stop making the product because of the coronavirus.” Costs for FMT products have doubled in recent years, and because Food and Drug Administration approval of the therapy is lacking, insurance does not cover it.
Dr. David Johnson also said that he is not “terribly happy” about the ACG recommendation for vancomycin prophylaxis. “It may help, but it also can have off-target effects against colonic bacterial flora, so we would not agree with that recommendation.”
The IDSA/SHEA authors also conditionally recommend bezlotoxumab, on very low certainty of evidence, as a cotherapy with standard of care antibiotics for recurrence prevention in patients with an episode in the last 6 months, particularly for patients at high recurrence risk “where logistics is not an issue.” The FDA has warned that this monoclonal antibody should be used with great care in patients with heart failure and only when benefits outweigh risks.
The ACG guidelines conditionally recommend considering bezlotoxumab to prevent recurrence in patients with specific risk factors, including age over 65 years and severe presentation. The IDSA/SHEA guidelines expand this population to anyone with a recurrence within 6 months, Dr. Fischer pointed out.
The antibody treatment “does offer another 10% absolute reduction in recurrent C. diff disease,” said Dr. Stuart Johnson, which is a “helpful option and primarily for people who have had recurrent C. diff already.” In general, he said, for both drugs, “access is still something we have to work with.”
In a commentary on the ACG guidelines, Dr. David Johnson wrote that there is good evidence that bezlotoxumab prevents relapse, especially in patients with specific risk factors. The hitch is the $4,500 price tag for a 1,000-mg vial, with a recommended dose of 10 mg/kg.
Dr. Stuart Johnson agreed that the costs of the fidaxomicin and bezlotoxumab are important considerations. In addition, there are logistical issues with using the antibody because most hospitals don’t offer infusions, which pushes patients to infusion centers.
Regardless, he added, “we’re happy that we have new options.”
Dr. Fischer, Dr. Stuart Johnson, and Dr. David Johnson reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
With two sets of Clostridioides difficile recommendations being published within a month of each other, clinicians may find themselves trying to reconcile some of the conflicts between the two guidelines.
The first set, published June 1 by the American College of Gastroenterology, focuses on fecal microbiota transplantation (FMT) and the antibiotic vancomycin. The second, published June 24 by the Infectious Diseases Society of America and Society for Healthcare Epidemiology of America, drives a shift in treatment for initial episodes and short-term recurrence from vancomycin to fidaxomicin and, in some cases, adding on the monoclonal antibody bezlotoxumab, both made by Merck.
The updates are timely because researchers are now recognizing that C. difficile can colonize people without causing symptoms, David Johnson, MD, professor of medicine and chief of gastroenterology at the Eastern Virginia School of Medicine, Norfolk, said in an interview. He was not involved in writing either set of guidelines. “C. diff infection was a hospital-type infection, but we’re now seeing it in up to approximately 35%-50% of patients coming from the community, so it’s a big concern.”
Although the guidelines agree on which treatments are effective, the recommendations give the options a different emphasis.
Infectious disease specialist Stuart Johnson, MD, professor of medicine at Loyola University Medical Center in Maywood, Ill., and a physician researcher at Edward Hines Jr. Veterans Affairs Hospital in Hines, Ill., is the first author in the IDSA/SHEA guidelines. He told this news organization that one reason the two sets of recommendations may diverge in emphasis for initial and recurrent C. difficile is that “everyone has a different way of looking at things.” Compared with infectious disease specialists like him, he said, gastroenterologists “for the most part see the world a little different and have their own bent on things.”
The differences between the two guidelines relate to the first-line therapy for people with an initial or recurrent C. difficile episode. For an initial episode, the IDSA/SHEA authors conditionally recommend fidaxomicin as first preferred choice over vancomycin, with a moderate certainty of evidence. They noted that implementing this recommendation depends on “available resources,” a reference to the higher cost and difficulty of access associated with fidaxomicin.
Gastroenterologist Monika Fischer, MD, an associate professor of medicine at Indiana University, Indianapolis, is one of the authors of the ACG guidelines. She told this news organization that the cost difference between fidaxomicin and vancomycin is considerable and finds the choice to foreground fidaxomicin puzzling. “They did not reference any new data compared to those we have published.” Their recommendation may make sense in terms of efficacy, but real-world demands require attention to cost and reimbursement. “They themselves state this in their recommendations,” she noted.
Dr. Fischer cited a ballpark of about $100 for a course of vancomycin, compared with about $3,000 for a course of fidaxomicin. The IDSA/SHEA guidelines do cite vancomycin as an acceptable alternative. According to Dr. Fischer, the ACG guidelines authors discussed fidaxomicin and concluded that there just wasn’t enough evidence to justify favoring this antibiotic over vancomycin, given the cost-benefit imbalance. The ACG guidelines call for a standard course of oral vancomycin for a first, nonsevere C. difficile episode, listing oral fidaxomicin or oral metronidazole as alternatives.
For a recurrence, the IDSA/SHEA authors also favor fidaxomicin in a conditional recommendation over a standard course of vancomycin. For multiple recurrences, a tapered and pulsed vancomycin regimen, vancomycin followed by rifaximin, or FMT are also options.
Dr. David Johnson said that these recommendations favoring fidaxomicin are “surprising,” and that lower costs of vancomycin outweigh the benefit of fidaxomicin, given more-or-less comparable data on cure rates.
In contrast, the ACG guidelines recommend that an initial recurrence be treated with a tapering dose of vancomycin, and call for FMT for patients who are eligible and who experience a second or more C. difficile recurrences after a round of pulsed vancomycin.
Dr. Stuart Johnson said that FMT carries its own special set of issues. “If you don’t have a donor program set up, you have to rely on a stool bank,” noting that one widely used stool bank “basically had to stop making the product because of the coronavirus.” Costs for FMT products have doubled in recent years, and because Food and Drug Administration approval of the therapy is lacking, insurance does not cover it.
Dr. David Johnson also said that he is not “terribly happy” about the ACG recommendation for vancomycin prophylaxis. “It may help, but it also can have off-target effects against colonic bacterial flora, so we would not agree with that recommendation.”
The IDSA/SHEA authors also conditionally recommend bezlotoxumab, on very low certainty of evidence, as a cotherapy with standard of care antibiotics for recurrence prevention in patients with an episode in the last 6 months, particularly for patients at high recurrence risk “where logistics is not an issue.” The FDA has warned that this monoclonal antibody should be used with great care in patients with heart failure and only when benefits outweigh risks.
The ACG guidelines conditionally recommend considering bezlotoxumab to prevent recurrence in patients with specific risk factors, including age over 65 years and severe presentation. The IDSA/SHEA guidelines expand this population to anyone with a recurrence within 6 months, Dr. Fischer pointed out.
The antibody treatment “does offer another 10% absolute reduction in recurrent C. diff disease,” said Dr. Stuart Johnson, which is a “helpful option and primarily for people who have had recurrent C. diff already.” In general, he said, for both drugs, “access is still something we have to work with.”
In a commentary on the ACG guidelines, Dr. David Johnson wrote that there is good evidence that bezlotoxumab prevents relapse, especially in patients with specific risk factors. The hitch is the $4,500 price tag for a 1,000-mg vial, with a recommended dose of 10 mg/kg.
Dr. Stuart Johnson agreed that the costs of the fidaxomicin and bezlotoxumab are important considerations. In addition, there are logistical issues with using the antibody because most hospitals don’t offer infusions, which pushes patients to infusion centers.
Regardless, he added, “we’re happy that we have new options.”
Dr. Fischer, Dr. Stuart Johnson, and Dr. David Johnson reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Texas doctor accused of vaccine theft faces grand jury
Hasan Gokal, MD, was fired from his job and charged with theft by a public servant. A judge dismissed the theft charge in January 2021, saying there was no probable cause, but prosecutors took the accusation to the Harris County Grand Jury, which on June 30 decided no prosecution was warranted, the Associated Press reported.
“I came as a practicing ER doctor into public health and as an ER doctor, I err on the side of life and that’s how I chose to make my decision,” Dr. Gokal told the Associated Press. “It was the right thing to do and it meant saving more lives.”
Dr. Gokal, 48, was supervising a COVID-19 vaccination clinic Dec. 29, 2020, in Humble, Tex., when the clinic closed for the day with an open vial containing nine doses of Moderna vaccine, the New York Times reported.
Since the vaccine would expire in 6 hours, Dr. Gokal scrambled to find people with medical conditions who needed vaccinating, he said. He gave the last dose to his wife, who has a lung condition, pulmonary sarcoidosis.
Dr. Gokal said he contacted his supervisor before acting and provided documentation the next day. He was fired for breaking protocol and then charged with theft.
“He abused his position to place his friends and family in line in front of people who had gone through the lawful process to be there,” Harris County District Attorney Kim Ogg said in a January statement. “What he did was illegal and he’ll be held accountable under the law.”
The AP reported that on June 30 the DA’s office issued a statement saying: “We respect the decision of the grand jury in this and every case. Evidence, not public opinion, is the guiding principle of our work.”
The AP said numerous doctors voiced support for Dr. Gokal and that the Texas Medical Board dismissed an investigation against him.
Dr. Gokal told the AP he’d still like to work in public health. Since being fired by the health department, he’s worked part time in the emergency departments at two Houston hospitals.
A version of this article first appeared on WebMD.com.
Hasan Gokal, MD, was fired from his job and charged with theft by a public servant. A judge dismissed the theft charge in January 2021, saying there was no probable cause, but prosecutors took the accusation to the Harris County Grand Jury, which on June 30 decided no prosecution was warranted, the Associated Press reported.
“I came as a practicing ER doctor into public health and as an ER doctor, I err on the side of life and that’s how I chose to make my decision,” Dr. Gokal told the Associated Press. “It was the right thing to do and it meant saving more lives.”
Dr. Gokal, 48, was supervising a COVID-19 vaccination clinic Dec. 29, 2020, in Humble, Tex., when the clinic closed for the day with an open vial containing nine doses of Moderna vaccine, the New York Times reported.
Since the vaccine would expire in 6 hours, Dr. Gokal scrambled to find people with medical conditions who needed vaccinating, he said. He gave the last dose to his wife, who has a lung condition, pulmonary sarcoidosis.
Dr. Gokal said he contacted his supervisor before acting and provided documentation the next day. He was fired for breaking protocol and then charged with theft.
“He abused his position to place his friends and family in line in front of people who had gone through the lawful process to be there,” Harris County District Attorney Kim Ogg said in a January statement. “What he did was illegal and he’ll be held accountable under the law.”
The AP reported that on June 30 the DA’s office issued a statement saying: “We respect the decision of the grand jury in this and every case. Evidence, not public opinion, is the guiding principle of our work.”
The AP said numerous doctors voiced support for Dr. Gokal and that the Texas Medical Board dismissed an investigation against him.
Dr. Gokal told the AP he’d still like to work in public health. Since being fired by the health department, he’s worked part time in the emergency departments at two Houston hospitals.
A version of this article first appeared on WebMD.com.
Hasan Gokal, MD, was fired from his job and charged with theft by a public servant. A judge dismissed the theft charge in January 2021, saying there was no probable cause, but prosecutors took the accusation to the Harris County Grand Jury, which on June 30 decided no prosecution was warranted, the Associated Press reported.
“I came as a practicing ER doctor into public health and as an ER doctor, I err on the side of life and that’s how I chose to make my decision,” Dr. Gokal told the Associated Press. “It was the right thing to do and it meant saving more lives.”
Dr. Gokal, 48, was supervising a COVID-19 vaccination clinic Dec. 29, 2020, in Humble, Tex., when the clinic closed for the day with an open vial containing nine doses of Moderna vaccine, the New York Times reported.
Since the vaccine would expire in 6 hours, Dr. Gokal scrambled to find people with medical conditions who needed vaccinating, he said. He gave the last dose to his wife, who has a lung condition, pulmonary sarcoidosis.
Dr. Gokal said he contacted his supervisor before acting and provided documentation the next day. He was fired for breaking protocol and then charged with theft.
“He abused his position to place his friends and family in line in front of people who had gone through the lawful process to be there,” Harris County District Attorney Kim Ogg said in a January statement. “What he did was illegal and he’ll be held accountable under the law.”
The AP reported that on June 30 the DA’s office issued a statement saying: “We respect the decision of the grand jury in this and every case. Evidence, not public opinion, is the guiding principle of our work.”
The AP said numerous doctors voiced support for Dr. Gokal and that the Texas Medical Board dismissed an investigation against him.
Dr. Gokal told the AP he’d still like to work in public health. Since being fired by the health department, he’s worked part time in the emergency departments at two Houston hospitals.
A version of this article first appeared on WebMD.com.
Small uptick in children’s COVID vaccinations can’t change overall decline
The weekly number of 12- to 15-year-olds receiving a first dose of COVID-19 vaccine rose slightly, but the age group’s share of all first vaccinations continues to drop, according to data from the Centers for Disease Control and Prevention.
the CDC reported on its COVID Data Tracker site.
As of July 5, not quite one-third (32.2%) of 12- to 15-year-olds had received at least one dose of the vaccine and 23.4% were fully vaccinated. For those aged 16-17 years, 44.5% have gotten at least one dose and 35.9% are fully vaccinated. Total numbers of fully vaccinated individuals in each age group are 4.9 million (12-15) and 3.4 million (16-17), the CDC said.
Looking at another measure, percentage of all vaccines initiated by each age group over the previous 14 days, shows that the decline has not stopped for those aged 12-15. They represented 12.1% of all first vaccines administered during the 2 weeks ending July 4, compared with 14.3% on June 28 and 23.4% (the highest proportion reached) on May 30. The 16- and 17-year olds were at 4.6% on July 4, but that figure has only ranged from 4.2% to 4.9% since late May, based on CDC data.
The numbers for full vaccination follow a similar trajectory. Children aged 12-15 represented 12.1% of all those completing the vaccine regimen over the 2 weeks ending July 4, down from 16.7% a week earlier (June 28) and from a high of 21.5% for the 2 weeks ending June 21. Full vaccination for 16- and 17-year-olds matched their pattern for first doses: nothing lower than 4.2% or higher than 4.6%, the COVID Data Tracker shows.
The weekly number of 12- to 15-year-olds receiving a first dose of COVID-19 vaccine rose slightly, but the age group’s share of all first vaccinations continues to drop, according to data from the Centers for Disease Control and Prevention.
the CDC reported on its COVID Data Tracker site.
As of July 5, not quite one-third (32.2%) of 12- to 15-year-olds had received at least one dose of the vaccine and 23.4% were fully vaccinated. For those aged 16-17 years, 44.5% have gotten at least one dose and 35.9% are fully vaccinated. Total numbers of fully vaccinated individuals in each age group are 4.9 million (12-15) and 3.4 million (16-17), the CDC said.
Looking at another measure, percentage of all vaccines initiated by each age group over the previous 14 days, shows that the decline has not stopped for those aged 12-15. They represented 12.1% of all first vaccines administered during the 2 weeks ending July 4, compared with 14.3% on June 28 and 23.4% (the highest proportion reached) on May 30. The 16- and 17-year olds were at 4.6% on July 4, but that figure has only ranged from 4.2% to 4.9% since late May, based on CDC data.
The numbers for full vaccination follow a similar trajectory. Children aged 12-15 represented 12.1% of all those completing the vaccine regimen over the 2 weeks ending July 4, down from 16.7% a week earlier (June 28) and from a high of 21.5% for the 2 weeks ending June 21. Full vaccination for 16- and 17-year-olds matched their pattern for first doses: nothing lower than 4.2% or higher than 4.6%, the COVID Data Tracker shows.
The weekly number of 12- to 15-year-olds receiving a first dose of COVID-19 vaccine rose slightly, but the age group’s share of all first vaccinations continues to drop, according to data from the Centers for Disease Control and Prevention.
the CDC reported on its COVID Data Tracker site.
As of July 5, not quite one-third (32.2%) of 12- to 15-year-olds had received at least one dose of the vaccine and 23.4% were fully vaccinated. For those aged 16-17 years, 44.5% have gotten at least one dose and 35.9% are fully vaccinated. Total numbers of fully vaccinated individuals in each age group are 4.9 million (12-15) and 3.4 million (16-17), the CDC said.
Looking at another measure, percentage of all vaccines initiated by each age group over the previous 14 days, shows that the decline has not stopped for those aged 12-15. They represented 12.1% of all first vaccines administered during the 2 weeks ending July 4, compared with 14.3% on June 28 and 23.4% (the highest proportion reached) on May 30. The 16- and 17-year olds were at 4.6% on July 4, but that figure has only ranged from 4.2% to 4.9% since late May, based on CDC data.
The numbers for full vaccination follow a similar trajectory. Children aged 12-15 represented 12.1% of all those completing the vaccine regimen over the 2 weeks ending July 4, down from 16.7% a week earlier (June 28) and from a high of 21.5% for the 2 weeks ending June 21. Full vaccination for 16- and 17-year-olds matched their pattern for first doses: nothing lower than 4.2% or higher than 4.6%, the COVID Data Tracker shows.