Background: HIV+ women are at high risk for HPV-associated cancers, but HPV infections at non-cervical anatomical sites have not been well studied in HIV+ women.
Objectives: To assess the prevalence of oral, vaginal, and anal HPV infection; and to understand factors associated with HPV infections in HIV+ women.
Methods: HIV+ women were recruited from 5 HIV/AIDS outpatient clinics. The participants answered a behavioral survey questionnaire, provided oral, vaginal, and anal swabs that were collected by a clinical nurse, and provided 10ml of blood. The swabs were tested for the presence of 37 types of HPV DNA using a PCR-based assay and the sera were tested for antibody responses to 12 HPV types using virus-like particles (VLPs) antigens by ELISA. HIV/AIDS-related clinical information was obtained from the medical records.
Results: Among 81 HIV+ women enrolled in this study, the majority were older than 40 years and had been infected with HIV for more than 10 years. Whites accounted for 54%, followed by blacks (27%) and Hispanics (14%). Multiple lifetime sexual partners, oral and anal sex history, and uses of tobacco/alcohol/drug were commonly reported. More than 60% reported knowing “nothing/a little” about HPV. Overall, HPV DNA was detected among 55% of women. The prevalence of oral, vaginal, and anal HPV infection were 7%, 37% and 40%, respectively. About 18% had multiple-site infection (>=2 anatomical sites) or multiple-type infection (>=2 HPV types). HPV infections with HPV16/18/6/11 were not common. Nearly 70% of HIV+ women have positive HPV VLP antibodies, mainly to HPV16/31/39/45/11. HPV-seropositive women were either not currently infected or infected with different HPV types.
Conclusions: HPV infections at non-cervical sites, especially with non-vaccine covered types, were common in HIV+ women. Natural HPV antibodies may be protective against HPV infection.
Implications for Programs, Policy, and Research: Adverse health outcomes related to oral, vaginal, and anal HPV infections should be further evaluated in HIV+ women.