89D-14 |
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A. HINTON, JR. and K. D. Ingram. Poultry Processing & Meat Quality Research Unit, USDA-ARS-Richard B. Russell Research Center, 950 College Station Rd., Athens, GA 30605-2720 Microflora of processed poultry is composed of pathogens that cause human foodborne diseases and spoilage microorganisms that reduce the shelf-life of fresh poultry. Although, several chemicals are currently used to reduce the number of microorganisms on processed poultry, contaminated poultry continues to be a source of human foodborne diseases. Alkali salts of fatty acids have been reported to possess antimicrobial activity that can reduce the number of microorganisms associated with food products. We hypothesize the antibacterial activity of mixtures of tripotassium phosphate (TPP) and lauric acid can reduce the number of bacteria on processed poultry. We have identified the effect of exposure time on the bactericidal activity of solutions of TPP and lauric acid. Our objective was to determine the time required for a solution of TPP and lauric acid to significantly reduce the number of bacteria in the native flora of the skin of processed broiler chickens. Skin samples were washed in solutions containing 3% TPP and 0.5% lauric acid for 0, 30, 60, 90, or 120 sec. Total aerobic bacteria including Campylobacter, Enterobacteriaceae, enterococci, lactic acid bacteria, pseudomonads, and Staphylococci in the rinsates of washed skin were enumerated. Results indicated that significantly fewer aerobic bacteria, Campylobacter, Enterobacteriaceae, Enterococci, lactic acid bacteria, and pseudomonads were recovered from skin washed for 30 sec in TPP-lauric acid solutions, and significantly fewer staphylococci were recovered from skin washed for 60 sec in this solution. Increasing the time that skin was washed in the solution did not result in further decreases in the bacterial populations. Findings indicate that a mixture of TPP and fatty acids possesses bactericidal activity against several microorganisms associated with processed poultry. The bacteria are killed within 30 to 60 sec of exposure to the solution, and extending the exposure time does not increase the antibacterial activity of the mixture.
Session 89D, Food Microbiology: Antimicrobial effects on foodborne microorganisms
2005 IFT Annual Meeting, July 15-20 - New Orleans, Louisiana |