Mutaciones asociadas con resistencia a rifampicina o isoniazida en aislamientos clínicos de M. tuberculosis de Sonora, México

摘要

Objective. To perform the analysis of specific regions of the major genes associated with resistance to isoniazid or rifampin. Materials and methods. Twenty two M. tuberculosis strains, isolated from human samples obtained in Sonora, Mexico. Specific primers for hotspots of the rpoB, katG, inhA genes and the ahpC-oxyR intergenic region were used. The purified PCR products were sequenced. Results. Mutations in the promoter of inhA, the ahpC-oxyR region, and codon 315 of katG and in 451 or 456 codons of rpoB, were identified. Conclusions.Detection of mutations not previously reported requires further genotypic analysis of Mycobacterium tuberculosis isolates in Sonora.