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National Research Agency on AIDS and Viral Hepatitis (ANRS).

This study documents the importance of HIV infection as an independent risk factor for the development of TB in children, and demonstrates that HIV-related immunosuppression is a critical risk factor for mortality in this population.

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We analyzed the genetic variability and phylogenetic relationships among 28 HIV-2 strains collected from patients enrolled in an HIV epidemiologic study in Abidjan, Ivory Coast, during 1995-1996. Although both subtype A (n = 8; 29%) and subtype B (n = 20; 71%) were present in this sampling, the majority of infections were caused by subtype B viruses. These findings contrasted with the reported predominance of HIV-2 subtype A in other African countries. The broad genetic diversity identified among protease gene sequences for HIV-2 subtype A (6%; range 3-15%) and subtype B (7%; range, 2-12%), and their presence in Abidjan during the 1980s, document a long coexistence of two viral subtypes in Ivory Coast. Our data indicate that viruses of subtypes A and B have contributed to the HIV-2 epidemic in Ivory Coast.