Multiple-antibiotic resistance and plasmid profiles of Salmonella Enteritidis isolated from retail chicken meats.

摘要

This study investigated the prevalence, antibiotics resistance and plasmid patterns of Salmonella Enteritidis on chicken meat samples (n = 578) collected over a period of 2 yrs from different retail outlets in a residential area of Namakkal City, South India. Salmonella Enteritidis was found in 92 of 578 samples (15.91%). Seasonal variations in prevalence patterns were identified with a higher prevalence occurring during the monsoon months (19.68%) followed by the post-monsoon (17.61%) and finally the premonsoon period. The isolates were resistant to >1 antibiotic, including those commonly used in poultry feeds, such as erythromycin, ampicillin, kanamycin, cephalothin and tetracyclin. All the isolates exhibited multiple antibiotic resistance (MAR) and contained >1 plasmid conferring antibiotics resistance. Plasmid size ranged between 0.43 and 115 MDa.