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- W2027962011 abstract "To perform a diversity surveillance study we characterized viral subtypes among newly diagnosed individuals in Buenos Aires city. Plasma samples were collected from 322 drug-naive newly diagnosed HIV-1 individuals attending two voluntary counseling and testing centers. Sequences of pol and vpu genes were obtained from 283 samples and viral subtype was characterized by Neighbor-joining trees and Bootscanning analysis. BF recombinants were found in 56.9% followed by subtype B strains (39.2%). CRF12_BF structure was found in 27% of BF while another 27% had that structure only in one of both genes analyzed. Unusual non-B-non-BF strains were found in 3.9% (11/283). They were further analyzed by database searching and maximum likelihood trees in order to track their origin. Two subtype C sequences were found to be related to South American isolates while another two subtype C sequences and the subtype C segment of a BC recombinant were found to be related to isolates from Senegal. We also identified the CRF16_A2D previously found in Argentina and the CRF06_cpx commonly prevalent in Africa. The B segment of a BD recombinant was also found to be related to the Argentinean Bs suggesting a recombination between an African and a local strain. We also found a BK and two BA recombinants. In conclusion, CRF16_A2D and a new line of subtype C (of Senegalese origin) seem to be successfully established and are now spreading in Buenos Aires. BF recombinants keep recombining with local strains losing the CRF12_BF structure. Altogether they are changing the diversity of HIV in Argentina." @default.
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- W2027962011 date "2007-10-01" @default.
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- W2027962011 title "HIV Type 1 Genetic Diversity Surveillance among Newly Diagnosed Individuals from 2003 to 2005 in Buenos Aires, Argentina" @default.
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- W2027962011 doi "https://doi.org/10.1089/aid.2007.0068" @default.
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