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KMID : 1171820040190040069
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Journal of Environmental and Sanitary Engineering
2004 Volume.19 No. 4 p.69 ~ p.75
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Inactivation of Escherichia coli O157 : H7, Salmonella Enteritidis and Listeria monocytogenes by Hydrogen Peroxide and Lactic acid
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Jang Jae-Seon
Lee Mi-Yeon
Lee Jea-Man
Kim Yong-Hee
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Abstract
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The inhibitory effect of the food processing agent on growth of Escherichia coli O157:H7, Salmonella Enteritidis, and Listeria monocytogenes was performed with hydrogen peroxide and lactic acid, and combination of hydrogen peroxide and lactic acid. The minimun inhibitory concentration (MIC) of hydrogen peroxide in E. coli O157:H7 was 100 ppm at pH 5.0, 6.0, 6.5 and 7.0, while in Listeria monocytogenes 25 ppm at pH 5.5, 6.0 and 50 ppm at pH 6.5, 75 ppm at pH 7.0. MIC of lactic acid in E. coli O157:H7 was 2500 ppm at pH 5.0, 6.0, 6.5 and 7.0. MIC of lactic acid in S. Enteritidis was 1250 ppm at pH 5.0, 2500 ppm at pH 5.5, 6.0, 6.5 and 7.0, while in L. monocytogenes 625 ppm at pH 5.5 and 125 ppm at pH 6.0, 6.5 and 7.0. MIC of combined hydrogen peroxide and lactic acid in E. coli O157:H7, S. Enteritidis, and L. monocytogenes was 75 ppm of hydrogen peroxide with 2500 ppm of lactic acid at pH 6.5. The correlations between MICs of hydrogen peroxide and lactic acid in E. coli O157:H7, S. Enteritidis and L. monocytogene were obtained through the coefficient of determination(R²). R² value were 0.9984, 0.9935 and 0.9283, respectively. The inhibitory effect of hydrogen peroxide and lactic acid in E. coli O157:H7, S. Enteritidis and L. monocytogenes could be confirmed from the result of this experiment. Therefore, it was expected that the food process would increase or maintain by using lactic acid together with hydrogen peroxide.
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