First detection of a novel HIV Type 1 CRF01_AE/07_BC recombinant among an epidemiologically linked cohort of IDUs in Jiangsu, China.

Our recent study showed that almost equal proportions of B, CRFs_BC, and CRF01_AE were circulating among MSM in Jiangsu, suggesting that there is a very high likelihood of generating new intersubtypes/CRFs recombinants. Here, we report an epidemiologically linked cohort including 22 HIV-1-positive IDUs in Jiangsu. Fifteen blood samples were collected to investigate HIV-1 subtype characterization. The analyses of gag-RT regions showed that 14 of these samples belonged to CRF07_BC. Importantly, we detected, for the first time, a novel second-generation HIV-1 recombinant (07JSNJ001) between CRF01_AE and CRF07_BC. The analyses of the near full-length genomic sequence of 07JSNJ001 (GenBank accession number FJ238521) showed that 07JSNJ001 is composed of at least 10 interlaced CRF07_BC and CRF01_AE segments, quite distinct from any previously identified CRF and URF around the world. The detection of the CRF01_AE/CRF07_BC recombinant may be a harbinger of more new intersubtypes/CRFs recombinants occurring in Jiangsu Province.