Estudio de susceptibilidad antimicrobiana de Salmonella enterica en muestras de origen animal y alimentario.

Resumen

ANTIMICROBIAL SUSCEPTIBILITY OF ANIMAL AND FOOD ISOLATES OF SALMONELLA ENTERICA.

Background: Bacterial resistance to one or more antimicrobials is worrisome. Aim: To determine the susceptibility to antimicrobials of Salmonella enterica isolates from animals and food, from the Laboratory of Veterinary Microbiology at the University of Concepción. Material and methods: The samples were isolated according to traditional microbiological methods standardized protocols. Resistance was determined by the Kirby-Bauer method and minimal inhibitory concentration (MIC), following Clinical and Laboratory Standards Institute recommendations (2008). Results: Nine serotypes were identified among the 68 isolates. Strains were   resistant to one or more antibiotics and 11 patterns of resistance were identified. Multidrug resistance (MDR) was observed in 20.5% of the strains tested. The most common was Oxytetracycline resistance (69.1%). In food, the predominant serotype was S. Derby (2.9%) and S. Senftenberg (2.9%), which is commonly found in food intended for animal consumption. In samples of animal origin, the predominant serotypes were S. Infantis (33.8%) and S. Group e (3.9 ;-;-) (23.5%). Conclusions: The frequency of resistance found   and the impending risk that these strains could reach humans through the food chain, should prompt a follow-up study of this pathogen.