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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2009 > Volume 8 Number 11 > A. Hinton Jr.1, J.A. Cason1, R.J. Buhr2 and K. Liljebjelke1

Bacteria Recovered from Whole-Carcass Rinsates of Broiler Carcasses Washed in a Spray Cabinet with Lauric Acid-Potassium Hydroxide

A. Hinton Jr.1, J.A. Cason1, R.J. Buhr2 and K. Liljebjelke1
1Poultry Processing and Swine Physiology Research Unit, 2Poultry Microbiological Safety Research Unit, Agricultural Research Service, United States, Department of Agriculture, 950 College Station Road, Russell Research Center, GA 30605, Athens, USA
Abstract :

Effects of spray washing carcasses with Lauric Acid (LA)-Potassium Hydroxide (KOH) on bacteria
recovered from Whole-Carcass Rinsates (WCR) were examined. Carcass skin was inoculated with antibiotic resistant strains of Escherichia coli, Salmonella Typhimirum and Campylobacter coli. The first trial examined effects of washing carcasses with water, 0.25% LA-0.125% KOH, 0.50% LA-0.25% KOH, 1.00% LA-0.50% KOH, or 2.00% LA-1.00% KOH at 80 psi for 15 sec. Findings indicated that significantly fewer Total Plate Count (TPC) bacteria, E. coli and Salmonella Typhimirum were recovered from carcasses washed with 2.00% LA-1.00% KOH than from carcasses washed with water and that no C. coli were recovered from carcasses washed with 2.00% LA-1.00% KOH. Another trial examined effects of washing carcasses at 60, 100, or 150 psi of pressure with 2.00% LA-1.00% KOH for 15 sec. Findings indicated that significantly fewer TPC bacteria were recovered from rinsates of carcasses washed with 100 psi than from carcasses washed with 60 or 150 psi. Finally, a trial was conducted to examine effects of washing carcasses for 0, 5, 15, or 30 sec with 2.00% LA-1.00% KOH at 100 psi. Results indicated that significantly fewer bacteria were recovered from carcasses washed for 5 sec than from unwashed carcasses. Furthermore, significantly fewer TPC bacteria and Salmonella Typhimirum were recovered from carcasses washed for 15 sec than for 5 sec and no C. coli were recovered from carcasses washed for 15 or 30 sec. Findings indicate that spray washing carcasses with LA-KOH can affect the number of bacteria recovered from WCR. These studies also provide data that may be useful in designing applications for using of microbicidal surfactants in processing operations.

Keywords :
Lauric acid, potassium hydroxide, spray washing, broilers, carcasses

Date Deposited : 06 Jul 2011 13:07

Last Modified : 06 Jul 2011 13:07

Official URL: http://www.pjbs.org/ijps/ijps.htm

Volume 8, Number 11, - 2009 , ISSN 1682-8356

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