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.
- Drug resistance