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1. High Prevalence and Genotype Diversity of Anal HPV Infection among MSM in Northern Thailand.

Author

Taweewat Supindham, Suwat Chariyalertsak, Utaiwan Utaipat, Toshiyuki Miura, Darin Ruanpeng, Nuntisa Chotirosniramit, Natthapol Kosashunhanan, Patcharaphan Sugandhavesa, Pongpun Saokhieo, Radchanok Songsupa, Sumalee Siriaunkgul, and Antika Wongthanee

Subjects
Medicine, Science
Abstract

HPV infection is common and may cause cancer among men who have sex with men (MSM). Anal HPV infection (HPV+) was found in 85% of HIV-positive (HIV+) and 59% of HIV-negative (HIV-) MSM in Bangkok, central Thailand. As little is known about HPV in this group in northern Thailand, we studied MSM subgroups comprised of gay men (GM), bisexual men (BM), and transgender women (TGW).From July 2012 through January 2013, 85 (42.5% of 200) GM, 30 (15%) BM, and 85 (42.5%) TGW who practiced receptive anal intercourse were recruited after informed consent, followed by self-assisted computer interview, HIV testing, and anal swabs for HPV genotyping.Of 197 adequate specimens, the overall prevalence of any HPV was 157 (80%). Prevalence was 89% (76/85) in GM, 48% (14/29) in BM, and 81% (67/83) in TGW. The most common high-risk types were HPV16 (27% of 197), HPV58 (23%), and HPV51 (18%). Prevalence of high-risk types was 74% in 85 GM, 35% in 29 BM, and 71% in 83 TGW. Prevalence of any HPV type, or high-risk type, was 100% and 94%, respectively, among 48 HIV+ MSM, 70% and 54% among 120 HIV- MSM. Of the 197 specimens, 36% (70) had HPV types 16 and/or 18 in the bivalent vaccine, compared to 48% (95) with ≥1 of types 16/18/06/11 in the quadrivalent, 56% (111) for 16/18/31/33/45/52/58 in the 7-valent, and 64% (126) for 16/18/31/33/45/52/58/06/11 in the 9-valent. HIV+, GM, and TGW were independently associated with HPV infection.We found higher rates of both any HPV and high-risk types than previous studies. Among the heretofore unstudied TGW, their equivalent HPV rates were comparable to GM. Current and investigational HPV vaccines could substantially protect GM, BM, and TGW from the serious consequences of HPV infection especially among HIV + MSM.

Published
2015
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2. High Prevalence and Genotype Diversity of Anal HPV Infection among MSM in Northern Thailand

Author

Sumalee Siriaunkgul, Radchanok Songsupa, Toshiyuki Miura, Natthapol Kosashunhanan, Nuntisa Chotirosniramit, Darin Ruanpeng, Antika Wongthanee, Patcharaphan Sugandhavesa, Taweewat Supindham, Pongpun Saokhieo, Utaiwan Utaipat, and Suwat Chariyalertsak

Subjects
Adult, Male, medicine.medical_specialty, Adolescent, Genotype, Human immunodeficiency virus (HIV), lcsh:Medicine, HIV Infections, medicine.disease_cause, Men who have sex with men, Young Adult, immune system diseases, Odds Ratio, Prevalence, Humans, Medicine, Papillomavirus Vaccines, Homosexuality, Male, Young adult, Papillomaviridae, lcsh:Science, reproductive and urinary physiology, Demography, Gynecology, Anus Diseases, Multidisciplinary, biology, Coinfection, business.industry, Papillomavirus Infections, lcsh:R, HPV infection, Genetic Variation, virus diseases, Odds ratio, Middle Aged, Thailand, biology.organism_classification, medicine.disease, female genital diseases and pregnancy complications, Logistic Models, Female, lcsh:Q, business, Research Article
Abstract

Background: HPV infection is common and may cause cancer among men who have sex with men (MSM). Anal HPV infection (HPV+) was found in 85% of HIV-positive (HIV+) and 59% of HIV-negative (HIV-) MSM in Bangkok, central Thailand. As little is known about HPV in this group in northern Thailand, we studied MSM subgroups comprised of gay men (GM), bisexual men (BM), and transgender women (TGW). Methods: From July 2012 through January 2013, 85 (42.5% of 200) GM, 30 (15%) BM, and 85 (42.5%) TGW who practiced receptive anal intercourse were recruited after informed consent, followed by self-assisted computer interview, HIV testing, and anal swabs for HPV genotyping. Results: Of 197 adequate specimens, the overall prevalence of any HPV was 157 (80%). Prevalence was 89% (76/85) in GM, 48% (14/29) in BM, and 81% (67/83) in TGW. The most common high-risk types were HPV16 (27% of 197), HPV58 (23%), and HPV51 (18%). Prevalence of high-risk types was 74% in 85 GM, 35% in 29 BM, and 71% in 83 TGW. Prevalence of any HPV type, or high-risk type, was 100% and 94%, respectively, among 48 HIV+ MSM, 70% and 54% among 120 HIV- MSM. Of the 197 specimens, 36% (70) had HPV types 16 and/or 18 in the bivalent vaccine, compared to 48% (95) with ?1 of types 16/18/06/11 in the quadrivalent, 56% (111) for 16/18/31/33/45/52/58 in the 7-valent, and 64% (126) for 16/18/31/33/45/52/58/06/11 in the 9-valent. HIV+, GM, and TGW were independently associated with HPV infection. Conclusions: We found higher rates of both any HPV and high-risk types than previous studies. Among the heretofore unstudied TGW, their equivalent HPV rates were comparable to GM. Current and investigational HPV vaccines could substantially protect GM, BM, and TGW from the serious consequences of HPV infection especially among HIV + MSM., PLOS ONE, 10(5), e0124499; 2015

Published
2015

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