Detection of the antimicrobial resistance genes bla, cfxA, tetQ, tetM, tetW and ermC in endodontic infections of a Mexican population.

Objectives: The aim of this study was to identify the prevalence of genes encoding resistance to three groups of antimicrobial agents in root canal samples from primary infection or post-treatment disease in Mexico.

Methods: A total of 64 subjects requiring root canal treatment because of primary infection or post-treatment disease were enrolled in this cross-sectional analytical study. Root canal samples were obtained and DNA was isolated.