Occurrence of potentially pathogenic nontuberculous mycobacteria in Mexican household potable water: a pilot study

• Published in: BMC research notes 2013-12, Vol.6 (1), p.531-531, Article 531
• Main Authors: Perez-Martinez, Iza, Aguilar-Ayala, Diana A, Fernandez-Rendon, Elizabeth, Carrillo-Sanchez, Alma K, Helguera-Repetto, Addy C, Rivera-Gutierrez, Sandra, Estrada-Garcia, Teresa, Cerna-Cortes, Jorge F, Gonzalez-Y-Merchand, Jorge A
• Format: Article
• Language: English
• Subjects: Bacterial Proteins - genetics; Bacterial Proteins - isolation & purification; Bacterial Typing Techniques; Chaperonin 60 - genetics; Chaperonin 60 - isolation & purification; Drinking water; Drinking Water - microbiology; Drug Resistance, Bacterial - genetics; Family Characteristics; Grants; Health aspects; Heat shock proteins; Households; Humans; Leprosy; Mexico; Microbiology; Microorganisms; Mortality; Mycobacterium; Mycobacterium avium; Nontuberculous Mycobacteria - genetics; Nontuberculous Mycobacteria - isolation & purification; Physiological aspects; Pilot Projects; Polymerase Chain Reaction; RNA; RNA, Ribosomal, 16S - genetics; RNA, Ribosomal, 16S - isolation & purification; Tuberculosis
• ISSN: 1756-0500; 1756-0500
• DOI: 10.1186/1756-0500-6-531

Nontuberculous mycobacteria (NTM) are environmental opportunistic pathogens found in natural and human-engineered waters, including drinking water distribution systems and household plumbing. This pilot study examined the frequency of occurrence of NTM in household potable water samples in Mexico City. Potable water samples were collected from the "main house faucet" and kitchen faucet. The presence of aerobic-mesophilic bacteria (AMB), total coliforms (TC), fecal coliforms (FC) and NTM species were determined. Mycobacteria species were identified by PCR restriction enzyme pattern analysis (PRA) of the 65-kDa heat shock protein gene (hsp65) and sequencing of the hypervariable region 2 (V2) of the 16S rRNA gene and of the rpoB gene. AMB (100 CFU/ml). TC and FC were detected in four and one samples, respectively. NTM species were recovered from 16% samples (19/120) and included M. mucogenicum (nine), M. porcinum (three), M. avium (three), M. gordonae (one), M. cosmeticum (one), M. fortuitum (one), and Mycobacterium sp (one). All household water samples that contained NTM complied with the standards required to grade the water as "good quality" potable water. Household potable water may be a potential source of NTM infection in Mexico City.