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Anal human papillomavirus infection in HIV-positive men and women at two opportunistic infections clinics in Harare, Zimbabwe.
BMC Public Health 2018 November 15
BACKGROUND: HIV-infected individuals are at increased risk of anal cancer; in the majority of cases this is linked to human papillomavirus (HPV) infection. Anal cancer screening is not routinely offered in Zimbabwe.
METHODS: A cross-sectional study was performed on 152 patients (88 females; 64 males) attending Opportunistic Infection Clinics at 2 tertiary hospitals between November 2014 and June 2015. Demographic data, immunological parameters and behavioural characteristics were collected. An anal swab was collected from each patient for HPV genotype testing. HPV testing was performed using MY09/MY11 PCR, followed by typing using the dot blot method.
RESULTS: The mean age was 39.6 years (range, 18-69 years). Median CD4 count was 375 cells/μL. 96% were on antiretroviral therapy. Only one patient identified as a man who has sex with men. Of 122 samples tested for HPV, 54 were positive (44%). HPV was three times more common in females (60%) than males (20%). Being HPV-positive was associated with history of perianal warts, history of cervical intraepithelial neoplasia and having more than ten lifetime sexual partners. The most commonly detected high-risk HPV genotypes were HPV-58 (13%), HPV-31 (11%) and HPV-16 (9%). Nine patients harboured multiple high-risk HPV types. The two most commonly detected low-risk genotypes were HPV-11 (17%) and HPV-53 (11%).
CONCLUSION: Overall anal HPV prevalence was 44% in this mostly heterosexual HIV-positive population. Oncogenic HPV types accounted for almost half of infections, supporting the need for surveillance of anal cancer in this population.
METHODS: A cross-sectional study was performed on 152 patients (88 females; 64 males) attending Opportunistic Infection Clinics at 2 tertiary hospitals between November 2014 and June 2015. Demographic data, immunological parameters and behavioural characteristics were collected. An anal swab was collected from each patient for HPV genotype testing. HPV testing was performed using MY09/MY11 PCR, followed by typing using the dot blot method.
RESULTS: The mean age was 39.6 years (range, 18-69 years). Median CD4 count was 375 cells/μL. 96% were on antiretroviral therapy. Only one patient identified as a man who has sex with men. Of 122 samples tested for HPV, 54 were positive (44%). HPV was three times more common in females (60%) than males (20%). Being HPV-positive was associated with history of perianal warts, history of cervical intraepithelial neoplasia and having more than ten lifetime sexual partners. The most commonly detected high-risk HPV genotypes were HPV-58 (13%), HPV-31 (11%) and HPV-16 (9%). Nine patients harboured multiple high-risk HPV types. The two most commonly detected low-risk genotypes were HPV-11 (17%) and HPV-53 (11%).
CONCLUSION: Overall anal HPV prevalence was 44% in this mostly heterosexual HIV-positive population. Oncogenic HPV types accounted for almost half of infections, supporting the need for surveillance of anal cancer in this population.
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