Microbiological quality of ready-to-eat vegetables collected in Mexico city: Occurrence of aerobic-mesophilic bacteria, fecal coliforms, and potentially pathogenic nontuberculous mycobacteria

Jorge Francisco Cerna-Cortes, Nancy Leon-Montes, Ana Laura Cortes-Cueto, Laura P. Salas-Rangel, Addy Cecilia Helguera-Repetto, Daniel Lopez-Hernandez, Sandra Rivera-Gutierrez, Elizabeth Fernandez-Rendon, Jorge Alberto Gonzalez-Y-Merchand

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

© 2015 Jorge Francisco Cerna-Cortes et al. The aims of this study were to evaluate the microbiological quality and the occurrence of nontuberculous mycobacteria (NTM) in a variety of salads and sprouts from supermarkets and street vendors in Mexico City. Aerobic-mesophilic bacteria (AMB) were present in 100% of RTE-salads samples; 59% of samples were outside guidelines range ( > 5.17 logCFU per g). Although fecal coliforms (FC) were present in 32% of samples, only 8% of them exceeded the permissible limit (100 MPN/g). Regarding the 100 RTE-sprouts, all samples were also positive for AMB and total coliforms (TC) and 69% for FC. Seven NTM species were recovered from 7 salad samples; they included three M. fortuitum, two M. chelonae, one M. mucogenicum, and one M. sp. Twelve RTE-sprouts samples harbored NTM, which were identified as M. porcinum (five), M. abscessus (two), M. gordonae (two), M. mucogenicum (two), and M. avium complex (one). Most RTE-salads and RTE-sprouts had unsatisfactory microbiological quality and some harbored NTM associated with illness. No correlation between the presence of coliforms and NTM was found. Overall, these results suggest that RTE-salads and RTE-sprouts might function as vehicles for NTM transmission in humans; hence, proper handling and treatment before consumption of such products might be recommendable.
Original languageAmerican English
JournalBioMed Research International
DOIs
StatePublished - 1 Jan 2015

Fingerprint Dive into the research topics of 'Microbiological quality of ready-to-eat vegetables collected in Mexico city: Occurrence of aerobic-mesophilic bacteria, fecal coliforms, and potentially pathogenic nontuberculous mycobacteria'. Together they form a unique fingerprint.

  • Cite this