alexa HIV-1 diversity and prevalence differ between urban and rural areas in the Mbeya region of Tanzania.
Immunology

Immunology

Journal of Vaccines & Vaccination

Author(s): Arroyo MA, Hoelscher M, Sateren W, Samky E, Maboko L,

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Abstract OBJECTIVE: To characterize HIV-1 strains in a potential vaccine trial cohort (CODE) in the Mbeya region of southwest Tanzania. DESIGN: Study volunteers (n = 3096) were recruited from urban areas in Mbeya Town, using two different recruitment strategies, and in a nearby rural village. METHODS: Cryopreserved plasma from 507 HIV-1 prevalent cases was the source of viral RNA for HIV-1 genotyping by the Multi-region Hybridization Assay, the MHA(acd), and selected strains were confirmed by complete genome sequencing. RESULTS: The overall HIV-1 prevalence was 16.6\% [95\% confidence interval (CI), 15.3-17.9] within the cohort. HIV-1 prevalence was higher among women, and in urban areas. Recruitment through advertisement targeted a high-risk urban male population for HIV-1 infection [adjusted odds ratio (adj. OR), 1.68; 95\% CI, 1.13-2.51] when compared with men recruited door-to-door. The complexity of the HIV-1 epidemic was also higher in urban areas evidenced by the high-risk of HIV-1 infection with a recombinant strain (adj. OR, 2.69; 95\% CI, 1.08-6.69) and HIV-1 dual infection (adj. OR, 5.16; 95\% CI, 1.07-24.9), mainly driven by urban men recruited through advertisement. CONCLUSIONS: Overall the urban epidemic was more genetically complex, with higher prevalence and more recombinants and dual infections. Vaccine trials in Mbeya region can assess a complex HIV-1 population dynamic and determine vaccine efficacy in relationship to the genetic diversity of HIV-1 strains that challenge vaccines.
This article was published in AIDS and referenced in Journal of Vaccines & Vaccination

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