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KMID : 1023519990220040411
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Korean Journal of Veterinary Service
1999 Volume.22 No. 4 p.411 ~ p.418
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Efficacy of chlorine and lactic acid for reducing pathogenic and spoilage microorganisms on chicken skin
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Lee Chul-Hyun
Byun You-Sung
Hwang Bo-Won
Kang Ho-Jo
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Abstract
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In this studies, the ability of chlorine and lactic acid to reduce bacterial population of the pathogenic microorganisms were examined on artificially inoculated chicken skin. About 10 cells of staphylococcus aureus, salmonella enteritidis, listeria monocytogenes and escherichia coli O157:H7 were inoculated in chicken skin. The contaminated samples were washed for 1 min with sodium hypochlorite solutions that contained 2, 5, 10, 20 and 50mg/ available chlorine and counted number of the agents. Viable population were no significantly difference (p0.05) between concentration of chlorine and strains of the pathogens. In the samples inoculated with pathogens were washed in 20mg/ chlorine and then stored at for up to 10 days, the initial counts of psychrotrophs and aerobic plate counts were 4.02 to 4.36 log cfu/ and increased slightly in course of time. But 10 days after, the pathogens were a little reduced from 3.66~4.91 log cfu/ to 2.54~4.66 log cfu/. In the case of washed skin with solution of 20mg/ chlorine and 0.5% lactic acid then store at for up to 10 days, population of psychrotrophs and aerobic plate counts on chicken skin were markedly reduced immediately after treatment, but the numbers of contaminants were slightly increased after 6 and 8 days. Specifically, numbers of St aureus, S enteritidis, L monocytogenes and E coli O157:H7 were reduced to 0.5, 0.4, 0.3 and 1.15 log cfu/ after 10 days of storage, respectively, on aerobic plate counts.
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KEYWORD
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Chicken meat, Chlorine, Lactic acid, Disinfectants, Microorganisms
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