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http://dx.doi.org/10.3746/jkfn.2007.36.12.1622

Effects of Aqueous Chlorine Dioxide against Escherichia coli O157:H7 and Listeria monocytogenes on Broccoli Served in Foodservice Institutions  

Ryu, Si-Hyun (Dept. of Nutrition and Foodservice Management, Paichai University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.36, no.12, 2007 , pp. 1622-1627 More about this Journal
Abstract
This study was undertaken to evaluate the effects of chlorine dioxide on reducing E. coli O157:H7 and L. monocytogenes on broccoli served in foodservice institutions. Broccoli samples inoculated with $10^6$ CFU/mL of E. coli O157:H7 and L. monocytogenes were treated with chlorine dioxide. Treatments with 5, 10, and 20 ppm for 1, 5, and 10 min were not sufficient in controlling E. coli O157:H7 on broccoli. L. monocytogenes were effectively reduced by $2.19{\sim}2.48log\;CFU/g\;and\;3.31{\sim}3.87log\;CFU/g$ with 10 and 20 ppm chlorine dioxide for 1, 5, and 10 min treatment, respectively, compared with the control. E. coli O157:H7 and L. monocytogenes population were significantly negatively correlated with concentration and treatment time of chlorine dioxide. These results show that the use of chlorine dioxide was effective in sanitizing L. monocytogenes on broccoli and the level of concentration was more associated with populations of E. coli O157:H7 and L. monocytogenes than treatment time of chlorine dioxide on broccoli.
Keywords
foodservice; broccoli; chlorine dioxide; E. coli O157:H7; L. monocytogenese;
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