Prevalence, antimicrobial resistance and molecular characterization of salmonella spp. and listeria monocytogenes isolated from chicken carcass

Abstract

This study aimed to investigate the prevalence of Salmonella spp. and Listeria monocytogenes, their antimicrobial resistance profile. L. monocytogenes was not isolated from any of the samples. Salmonella spp. was detected from 32 (8%) out of the 400 collected samples. Antimicrobial resistance was most frequently observed to nalidixic acid (100%), tetracycline (93.75%), erythromycin (90.6%), streptomycin (84.3%), followed by kanamycin (62.5%). Also, 37.5% of Salmonella isolates were phenotypically confirmed as ESBL producers. Multiple drug resistance was defined 93.75% of the isolates. Among the Salmonella isolates, all of them harbouring qnrB and qnrS genes and, 37.5% of them presented blaTEM gene.

Keywords

• antimicrobial resistance
• carcass
• chicken
• listeria monocytogenes
• salmonella