[Subtype analysis of gp41 gene of HIV-1 among men who have sex with men in Zhengzhou].

Objective: This study aimed to investigate the subtype distribution of gp41 gene of human immunodeficiency virus-1 (HIV-1) among men who have sex with men (MSM) in Zhengzhou.

Methods: Thirty blood samples were collected from men who have sex with men infected by HIV. The complete gp41 gene was amplified by RT-PCR and nested-PCR and sequenced.

[Subtype and sequence analysis of gag gene of HIV-1 among men who have sex with men in Zhengzhou, Henan Province].

To investigate the subtype distribution of human immunodeficiency virus-1(HIV-1) infection among men who have sex with men (MSM) in Zhengzhou, Henan Province, forty blood samples were collected from HIV-1 carriers, who acknowledged to have sex with men. The complete gag gene was amplified by RT-PCR and nested-PCR and sequenced. All sequences were edited by BioEdit and subtyped by genotyping software.