[Study on HIV-1 related genetics and threshold on drug resistance in Dehong prefecture of Yunnan province in 2012].

OBJECTIVE: To study the HIV-1 genotypes and transmitted drug resistance (TDR) in Dehong prefecture of Yunnan province in 2012. METHODS: Referring to the guidelines for HIV drug resistance threshold survey (HIVDR-TS), 60 plasma samples of recently reported HIV-infected individuals between 16 and 25 years old were collected in Dehong prefecture from January to August 2012. Genotyping of partial pol gene was performed by using reverse transcriptional PCR. HIV-1 genotype and the prevalent levels of HIV-1 drug resistance transmission were analyzed. RESULTS: 52 plasma samples were successfully sequenced and analyzed. Among them, 59.6% were Chinese, and the rest (40.4%) were Burmese. Based on pol sequences, identified HIV genotypes would include unique recombinant forms (URFs, 38.5%), subtype C (34.6%), CRF01_AE (21.2%), CRF08_BC (3.8%), and subtype B (1.9%). One drug resistant mutation to non-nucleoside reverse transcriptase inhibitors (NNRTIs) was detected in respective two sequences. Based on the statistical method of HIVDR-TS, the prevalence of transmitted HIV-1 drug resistance was adjusted as a moderate level (5%-15%). CONCLUSION: Diverse HIV-1 genotypes were found in this study, and the current HIV-1 drug resistant strains transmission was catalogued as moderate prevalence level in Dehong.