MULTIDRUG RESISTANT AND EXTENDED SPECTRUM b-LACTAMASE PRODUCING SALMONELLA ENTERICA ISOLATED FROM FOOD ANIMALS IN PHATTHALUNG, THAILAND.

This study investigated antimicrobial resistance profiles and genes of b-lactamase-producing Salmonella enterica, isolates from animal feces and meat samples at small-scale rural farms in Phatthalung Province, Thailand. Of 40 isolates from swine feces 50%, 47%, 17%, 17%, and 15% were resistant to ampicillin, streptomycin, nalidixic acid, tetracycline, and chloramphenicol, respectively; of 29 isolates from chicken feces 33%, 27%, 7%, and 3% were resistant to streptomycin, nalidixic acid, tetracycline, and ampicillin, respectively; and of 6 isolates from cattle feces 67% were resistant to sulfamethoxazole and tetracycline, and 33% resistant to ampicillin, nalidixic acid and streptomycin. Of the 23 isolates from chicken meat 96%, 96%, 78%, 73%, 61%, 30%, and 9% were resistant to sulfamethoxazole, streptomycin, ampicillin, tetracycline, nalidixic acid, chloramphenicol, and ciprofloxacin, respectively; and of 31 isolates from pork meat 87%, 77%, 39%, 32%, 10% and 10% were resistant to sulfamethoxazole, tetracycline, streptomycin, ampicillin, nalidixic acid, and chloramphenicol, respectively. Three ampicillin-resistant isolates from swine feces carried the same extended-spectrum b-lactamase gene belonging to blaCTX-M group 1. The results of this study confirm the existence of ESBL in S. enterica isolated from food animals. Occurrence of an ESBL producing strain of S. enterica constitutes a public health threat through transmission of these strains to humans via contaminated food or...
Source: Southeast Asian Journal of Tropical Medicine and Public Health - Category: Tropical Medicine Tags: Southeast Asian J Trop Med Public Health Source Type: research