BACKGROUND:
Prevalence
estimates of anal high-risk human papillomavirus (HR-HPV) are needed in
sub-Saharan Africa where HIV is endemic. This study evaluated anal HR-HPV in
Nigeria among HIV-positive and HIV-negative men who have sex with men (MSM) for
future immunization recommendations.
METHODS:
We
conducted a cross-sectional study to compare the prevalence of anal HR-HPV
infections between 64 HIV-negative and 90 HIV-positive MSM. Multivariate Poisson
regression analyses were used to examine demographic and behavioral risk
factors associated with any HR-HPV infections.
RESULTS:
The
median age of the 154 participants was 25 years (interquartile range, 22-28
years; range, 16-38 years), and the median age at initiation of anal sex with
another man was 16 years (interquartile range, 13-18 years; range, 7-29 years).
The prevalence of anal HR-HPV was higher among HIV-positive than HIV-negative
MSM (91.1% vs. 40.6%, P < 0.001). In the multivariate analysis, HIV
infection (adjusted prevalence ratio [aPR], 2.02; 95% confidence interval [CI],
1.49-2.72), 10 years or more since anal sexual debut (aPR, 1.26; 95% CI,
1.07-1.49), and concurrent relationships with men (aPR, 1.32; 95% CI,
1.04-1.67) were associated with increased anal HR-HPV prevalence.
CONCLUSIONS:
Anal
HR-HPV infection is high for young Nigerian MSM, and rates are amplified in
those coinfected with HIV. Providing universal coverage as well as catch-up
immunization for young MSM may be an effective anal cancer prevention strategy
in Nigeria.
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- 1From the *Institute of Human Virology and †Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD; ‡University of New Mexico Health Sciences Center, Albuquerque, NM; §University of Maryland School of Public Health, College Park, MD; Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; and ∥Institute of Human Virology Nigeria, Federal Capital Territory, Nigeria.
- Sex Transm Dis. 2016 Apr;43(4):243-8. doi: 10.1097/OLQ.0000000000000431.
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