Influence of poultry carcass skin sample site on the effectiveness of trisodium phosphate against Listeria monocytogenes.
The aim of this study was to determine the influence of skin sample site on the efficacy of trisodium phosphate (TSP) solutions in reducing Listeria monocytogenes populations on chicken carcasses during refrigerated storage. Chicken skin samples from the legs, the breasts, and the dorsal area inoculated with L. monocytogenes (10(8) CFU/ml) were dipped for 15 min in sterile tap water (control) or in 8, 10, or 12% TSP. L. monocytogenes counts and surface pH values were determined after 0, 1, 3, and 5 days of storage at 2 degrees C. For all sampling times and TSP concentrations, the reductions in L. monocytogenes numbers in breast skin were significantly larger (P < 0.05) than those in leg skin or dorsal skin. No significant differences were found in pH values as an effect of skin site. Our results suggest that skin sampling site is an important factor that needs to be considered when decontamination protocols are developed for poultry carcasses with the TSP treatment.
Capita
Rosa
R
Department of Food Hygiene and Food Technology, Veterinary Faculty, University of León, Spain. dhtrcg@unileon.es
Alonso-Calleja
Carlos
C
Rodríguez-Pérez
Roberto
R
Moreno
Benito
B
García-Fernández
María del Camino
Mdel C
D000818:Animals; D002645:Chickens; D015169:Colony Count, Microbial; D005511:Food Handling / Q000379:methods*; D008089:Listeria monocytogenes / Q000187:drug effects* / Q000254:growth & development; D010710:Phosphates / Q000494:pharmacology*; D012034:Refrigeration; D012867:Skin / Q000382:microbiology*; D013997:Time Factors; D016896:Treatment Outcome
D010710:Phosphates; C018279:sodium phosphate