Abstract
In this study, we report a novel HIV-1 second-generation recombinant form composed of CRF01_AE and subtype B detected from a married HIV-positive male subject infected through homosexual behavior in Tianjin in northern China. The near full-length genome analyses showed that two regions of subtype B inserted into the CRF01_AE backbone with four recombinant breakpoints observed in the pol gene region. Subregion tree analyses demonstrated that the CRF01_AE regions of the recombinant were greatly clustered with the CRF01_AE subcluster 4 lineage, which was found primarily among men who have sex with men (MSM) in northern China. To the best of our knowledge, this is the first detection of a novel HIV-1 second-generation recombinant form (CRF01AE/B) in Tianjin, which indicates active transmission networks of HIV-1 infection among MSM in this region. The emergence of the novel second-generation recombinant form highlights the increasing complexity of HIV-1 epidemic among MSM population and the importance to monitor potential novel circulating recombinant forms.
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