Emergence of a New HIV Type 1 CRF01_AE Variant in Guangxi, Southern China |
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Authors: | Zeng Haiyan Sun Zhiwu Liang Shujia Li Lingnuo Jiang Yanyan Liu Wei Sun Binlian Li Jingyun Yang Rongge |
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Institution: | 1 Research Group of HIV Molecular Epidemiology and Virology, The State Key Laboratory of Virology, Wuhan Institution of Virology, Chinese Academy of Sciences , Wuhan, Hubei, The People's Republic of China . |
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Abstract: | Abstract The distribution of HIV-1 subtypes and genetic characterization of CRF01_AE in Guangxi, southern China were identified. The distribution of HIV-1 genotypes based on gag, pol, and partial env sequences (n=349) was as follows: CRF01_AE (66.5%), CRF08_BC (19.2%), CRF07_BC (7.2%), URF (4.6%), subtype B (1.7%), and subtype B' (0.9%). CRF01_AE predominated in all geographic regions and risk populations and there were multiple introductions of CRF01_AE strains in Guangxi. We found a peculiar CRF01_AE monophyletic lineage distinct from other CRF01_AE viruses, and we designated it "CRF01_AE-v" for convenience. CRF01_AE-v circulating in both heterosexuals and injecting drug users (IDUs) had accounted for 39.7% of CRF01_AE. It showed a selective advantage in the Guangxi population and formed its own characteristic compared with all the CRF01_AE references. Our results suggested that CRF01_AE-v was a new variant of CRF01_AE and it might lead to a new epidemic in Guangxi. |
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