Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Inhibitory Effect of Dry-Heat Treatment and Chemical Sanitizers against Foodborne Pathogens Contaminated on the Surfaces of Materials

재질 표면에 오염된 여러 병원성 세균에 대한 건열살균 및 살균소독제의 저해효과

  • 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)
  • 배영민 (중앙대학교 생활과학대학 식품영양학과) ;
  • 허성기 (농촌진흥청 국립농업과학원 농산물안전성부 유해생물과) ;
  • 이선영 (중앙대학교 생활과학대학 식품영양학과)
  • Published : 2009.09.30
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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.

조리기구 및 도구의 재질 표면에 오염된 병원성 세균은 외식 및 단체급식에서 교차 오염의 원인으로 작용할 수 있으며, 이들이 표면에 형성시킨 biofilm은 세척 및 살균소독 과정에서도 살아남아 식중독의 위험을 증가시킨다. 따라서 본 연구에서는 상업적 살균소독제와 $71^{\circ}C$ 건열 살균을 하였을 때 스테인리스 스틸과 폴리프로필렌에 오염된 5종류의 병원성 미생물(E. coli O157:H7, S. Typhimurium, P. aeruginosa, L. monocytogenes, S. aureus)의 부착세포와 biofilm에 대한 저해 효과를 평가하였다. 결과로 염소계와 $71^{\circ}C$ 건열처리는 모두 유의적인 저해효과를 나타내지 않았다. 알코올계살균소독제는 스테인리스 스틸과 폴리프로필렌에서 각각 3.4$\sim$6.4 log, 5.5$\sim$7.4 log CFU/coupon 수준의 감소를 보여 강한 살균력을 나타내는 것으로 관찰되었다. 살균소독제 처리는 단체급식소에서 가장 일반적으로 사용하고 있는 소독방법이지만, 살균소독제 종류에 따라서 살균 효과 차이가 크고, 미생물의 오염되어 있는 물질 및 오염 방법 등 처리 조건의 차이에 따라 결과가 달라질 수 있다. 그러므로 효과적인 살균 소독을 위해 보다 다양한 조건과 처리방법에 대한 연구가 이루어져야 할 것으로 사료된다.

Keywords

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