alexa Impact of small reductions in plasma HIV RNA levels on the risk of heterosexual transmission and disease progression.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Modjarrad K, Chamot E, Vermund SH

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Abstract OBJECTIVE: To estimate the impact of small changes in plasma levels of HIV-1 RNA on the risk of heterosexual transmission or disease progression to an AIDS-defining event or death. DESIGN AND METHODS: We systematically reviewed the published literature for studies that evaluated small viral load changes among antiretroviral-therapy-naive, adult populations. We modeled relative risk estimates for viral transmission and disease progression according to 0.3, 0.5, and 1.0 log10 increments of HIV load. RESULTS: We calculated that the likelihood of transmitting HIV by heterosexual contact increased, on average, by 20\% and that the annual risk of progression to an AIDS-defining illness or related death increased by 25\% with every 0.3 log10 increment in HIV RNA. A 0.5 log10 increment in HIV RNA was associated with 40\% greater risk of heterosexual transmission and 44\% increased risk of progression to AIDS or death. A 1.0 log10 increment in HIV RNA was associated with 100\% greater risk of heterosexual transmission and 113\% increased risk of progression to AIDS or death. CONCLUSION: Antiretroviral therapy continues to be unavailable or not-yet-indicated for 72\% of the world's HIV-infected persons. Mounting evidence that treatment of coinfections may reduce HIV viral load, even modestly, suggests the priority of improved adjunctive care for HIV-infected persons even without antiretroviral therapy, both to slow disease progression and to reduce infectiousness.
This article was published in AIDS and referenced in Journal of Clinical & Cellular Immunology

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