Castillo Julio, Comegna Mario, Quijada Wilmary, Jauvin Valérie, Pinson Patricia, Masquelier Bernard, Fleury Hervé, Castro Erika
Department of Internal Medicine, Vargas Hospital, Central University of Venezuela, Caracas, Venezuela.
AIDS Res Hum Retroviruses. 2009 Dec;25(12):1329-33. doi: 10.1089/aid.2009.0118.
We have studied 65 HIV-1-infected untreated patients recruited in Caracas, Venezuela with TCD4 counts > or =350/microl. The reverse transcriptase and protease sequences of the virus were sequenced, aligned with reference HIV-1 group M strains, and analyzed for drug resistance mutations. Most of the viruses were subtype B genotype in both the protease and RT genomic regions. Five of the 62 virus isolates successfully amplified showed evidence of recombination between protease and RT, with their protease region being non-B while their RT region was derived from subtype B. Four strains were found bearing resistance mutations either to NRTIs, NNRTIs, or PIs. The prevalence of HIV-1 isolates bearing resistance mutations was therefore above the 5% threshold of WHO.
