Print version ISSN 0123-9392
GOMEZ, Sandra M; OLAYA, Patricia and DIAZ, Francisco J. Resistance to antiretrovirals in patients receiving HIV-AIDS therapy in Colombia. Infect. [online]. 2010, vol.14, n.4, pp. 248-256. ISSN 0123-9392.
Objective. To characterize the resistance to anti-retroviral drugs in patients subject of genotypic sensitivity testing in Colombia during 2000-2007. Design. Descriptive, retrospective, laboratory based. Methods. Between the years 2000 and 2007 the sequences of the HIV protease and transcriptase genes were obtained from 650 patients presumably under antiretroviral treatment throughout the country. The sequences were processed with the program "geno2pheno resistance", which infers the resistance by using the sequences. The results were statistically analyzed. Results. 82.1% of the viral strains were resistant to one or more drugs. The frequency of resistance was higher for lamivudine (55.4%), nevirapine (54.3%), and efavirenz (52.6%), and lower for stavudine (11.0%). 45.1% were resistant to zidovudine. Resistance to protease inhibitors varied between 30% and 38%. We observed that the frequency of resistance is rising for the reverse transcriptase inhibitors but not for the protease inhibitors. Conclusions. The frequency of resistance was higher for the antiretroviral drugs with a lower genetic barrier and for those which use has increased during these last years.
Keywords : HIV; AIDS; antiretroviral therapy; resistance; mutation; genotyping; Colombia.