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http://dx.doi.org/10.3746/jkfn.2009.38.9.1265

Inhibitory Effect of Dry-Heat Treatment and Chemical Sanitizers against Foodborne Pathogens Contaminated on the Surfaces of Materials  

Bae, Young-Min (Dept. of Food and Nutrition, Chung-Ang University)
Heu, Sun-Gi (Microbial Safety Division, Department of Agro-food Safety, National Academy of Agricultural Science, Rural Development Adminstration)
Lee, Sun-Young (Dept. of Food and Nutrition, Chung-Ang University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.38, no.9, 2009 , pp. 1265-1270 More about this Journal
Abstract
Pathogens contaminated on the surface of utensils could contribute to the occurrence of outbreaks due to cross-contamination to foods during the food preparation process. Therefore, the efficacy of chemical sanitizers (chlorine-based and alcohol-based commercial sanitizers) and dry-heat ($71^{\circ}C$) on inhibiting biofilms of five foodborne pathogens (Escherichia coli O157:H7, Salmonella Typhimurium, Pseudomonas aeruginosa, Listeria monocytogenes, and Staphylococcus aureus) on the surface of stainless steel and polypropylene were investigated in this study. Initial populations of pathogens were 8.8$\sim$9.3 and 9.4$\sim$10.3 log CFU/coupon on the surface of stainless steel and polypropylene coupon, respectively, and these populations were not significantly reduced when they were treated with water for 5 min at room temperature. Treatments with chlorine sanitizer and dry-heat were not effective on inactivating pathogens on the surfaces of stainless steel and polypropylene. In contrast, treatments with alcohol sanitizer were very effective on inactivating pathogens on the surfaced of stainless steel and polypropylene. Reduction levels ranged from 3.4 to 6.4 log and from 5.5 to 7.4 log CFU/coupon in stainless steel and plastic coupons, respectively. From these results, alcohol-based sanitizer could be used as a potential way for controlling microbial contamination on the surface of utensils, cooking equipment, and other related environments.
Keywords
pathogen; biofilm; cross-contamination; sanitizer; dry-heat;
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Times Cited By KSCI : 8  (Citation Analysis)
Times Cited By SCOPUS : 3
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