Trisodium Phosphate and Cetylpyridinium Chloride Spraying on Chicken Skin to Reduce Attached Salmonella typhimurium

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Abstract:

Spraying treatments with trisodium phosphate (TSP) and cetylpyridinium chloride (CPC) were evaluated for their effectiveness in reducing Salmonella typhimurium attached to chicken skins. Chicken skins with an area of 38.5 cm2 were cut from the breast areas of pre-chill chicken carcasses, mounted in a plastic holder, and inoculated with S. typhimurium. The inoculated skins were sprayed with tap water, 10% (wt/vol) TSP, or 0.1% CPC solutions at 10, 35, or 60°C and 206.8, 413.7, 620.5, 827.4, or 1034.2 kPa for 30 s. After spraying, each skin was rinsed with tap water, transferred to a plastic bag containing 50 ml buffered peptone water, and stomached for 1 min. The stomaching water was collected, diluted serially, plated on xylose lysine tergitol 4 (XLT4) agar and Petrifilm aerobic count plates, and incubated for 18 to 24 h at 37°C. The results showed that tap water spraying reduced S. typhimurium by 0.7 to 1.6 log, while the reduction ranges for TSP and CPC spraying treatments were 1.6 to 2.3 and 1.5 to 2.5 log, respectively. Greater reductions in the numbers of S. typhimurium were obtained in TSP spraying treatments in the high pressure range (620.5 to 1034.2 kPa) and in CPC spraying treatments at 10°C.

Keywords: CETYLPYRIDINIUM CHLORIDE; POULTRY SKIN; S. TYPHIMURIUM; SPRAYING; TRISODIUM PHOSPHATE

Document Type: Research Article

Affiliations: 1: Department of Biological & Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA 2: Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA

Publication date: August 1, 1997

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