Submitted to: Poultry Science Association Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/9/2004
Publication Date: 7/25/2004
Citation: Ladely, S.R., Berrang, M.E., Cray, P.J., Simmons, M., Fletcher, D.L. 2004. Antimicrobial susceptibility patterns of salmonella for fresh whole chickn carcasses. Poultry Science Association Meeting Abstract.[abstract]. Poultry Science. 83(suppl.1)(11):M44.
Technical Abstract: Salmonella is frequently reported as a cause of food-borne illness. The emergence of antimicrobial resistant Salmonella associated with food animals and their products has heightened concerns regarding antimicrobial use in food animal production. Eighty Salmonella isolates recovered from fresh whole chicken carcasses purchased at retail outlets were examined for susceptibility to 18 antimicrobials. Fifteen serotypes were identified; predominant serotypes included; S. heidelberg (25%), S. typhimurium var. copenhagen (18.75%), S. kentucky (17.5%), S. berta (11.25%), and S. hadar (8.75%). Across all serotypes, 43.75% of the isolates were resistant to one or more antimicrobial. Fourteen resistance patterns were observed among the isolates. Among these isolates, 22.5% were resistant to less than 3 antimicrobials, 16.25% were resistant to 4-6 antimicrobials, and 5.0% were resistant to greater than 7 antimicrobials. Across all serotypes, resistance was most commonly observed to tetracycline (25%), ampicillin (22.5%), streptomycin (21.25%) and cephalosporin derivatives (cephalothin 18.75%, ceftiofur 16.25%, and cefoxitin 15%). Resistance patterns tended to group by serotype, however, 3 resistance patterns were common among different serotypes. The prevalence of antimicrobial resistance varied by serotype, ranging from 20% for S. heidelberg to 100% for S. hadar. All 7 S. hadar isolates were resistant to 1-2 antimicrobials, 4 of 20 S. Heidelberg isolates were resistant to 3 or fewer antimicrobials, 10 of 15 S. typhimurium var. copenhagen isolates were resistant to 4-5 antimicrobials, 7 of 14 S. kentucky isolates were resistant to 1-7 antimicrobials, and 3 of 9 S. berta isolates expressed resistance to 9-11 antimicrobials. These data indicate that Salmonella recovered from retail poultry carcasses may be resistant to multiple antimicrobials, and that resistance among these isolates varies by serotype.