AbstractSalmonella has been reported to be presence both in raw and processed foods worldwide. Inthis study, the prevalence, quantification and antibiotic susceptibility of Salmonella isolatedfrom raw vegetables or locally known as ulam such as asiatic pennywort (Centella asiatica (L)Urb), water dropwort (Oenanthe javanica (Blume) DC), long bean (Vigna sinensis EndL), andwinged bean (Psophocarpus tetragonolobus (L) DC) obtained from retail markets in Selangor,Malaysia were carried out. From 96 samples tested, the overall prevalence of Salmonellaspp. was 97.9%, Salmonella Enteritidis was 54.2% and Salmonella Typhimurium was 82.3%respectively. Samples were contaminated with Salmonella ranging from <3 to 2400 MPN/g.Salmonella Enteritidis and Salmonella Typhimurium isolates obtained from the raw vegetables(ulam) were found to exhibit high resistance against ampicillin (100%), erythromycin (100%),amoxicillin/clavunic acid (81.3%), cephalothin (75%), streptomycin (50%) and ciprofloxacin(50%). All Salmonella isolates showed multi drug resistant (MDR) profile with each isolatebeing resistant to 3 or more antibiotics. The multiple antibiotic resistance (MAR) index ofSalmonella isolates ranged from 0.27 to 0.55 for Salmonella Enteritidis and 0.27 to 0.82 forSalmonella Typhimurium. The presence of Salmonella on raw vegetables (ulam) and highantibiotic resistance isolates indicated that raw vegetables could be contaminated and thusimposes possible health risk to local consumers.
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