Evaluation of Efficacy and Development of Predictive Model of Sanitizers and Disinfectants on Reduction of Microorganisms on Food Contact Surfaces

스테인리스 스틸 식품기구 표면에 사용되는 주요 살균소독제의 살균력 평가 및 살균예측모델 개발

  • Lee, Yu-Si (School of Food Science and Technology, Chung-Ang University) ;
  • Ha, Sang-Do (School of Food Science and Technology, Chung-Ang University) ;
  • Kim, Dong-Ho (Seowon University) ;
  • Park, Joon-Hee (School of Food Science, College of Science and KyungPook National University)
  • Received : 2011.07.17
  • Accepted : 2011.09.07
  • Published : 2011.09.30

Abstract

This study was to evaluate the efficacy of sanitizer concentrations and treatment time against two major toad-borne pathogenic microorganisms such as Escherichia coli and Staphylococcus aureus on a stainless steel surface. As a result, stainless steel, treated with 100 ppm of chlorine showed reduction of E. coli(1.56, 1.49, 1.95 log cfu/25 $cm^2$) and S. aureus(0.49, 0.88, 1.27 log cfu/25 $cm^2$) after 0, 5 and 10 min, but none was not detected in treatment with 200 ppm. The population of E. coli(0.73, 0.90, 1.55 log cfu/25 $cm^2$) and S. aureus(0.37, 1.00, 1.45 log cfu/25 $cm^2$) reduced in 35.5% ethanol treated group, but none was not detected in treatment with 70%. The population was reduced E coli(0.28, 0.64, 1.07 cfu/25 $cm^2$) and S. aureus(0.53, 0.87, 0.99 log cfu/25 $cm^2$) by treatment with 45.5 ppm of hydrogen peroxide, but none was not detected in treatment with 91 ppm. Quarternary ammonium compound with 100 ppm was reduced E. coli(0.82, 1.62, 1.71 log cfu/25 $cm^2$) and S. aureus(0.46, 0.93, 1.38 log cfu/25 $cm^2$), but none was not detected in treatment with 200 ppm. Predictive models of sterilization for all 4 disinfectants were suitable to use with $r^2$ value of higher than 0.94. These models may be of use to food services and manufacture of safe products by controlling E. coli and S. aureus without the need for further detection of the organisms.

본 연구는 기구 표면에 존재하는 주요 오염균인 E. coli와 S. aureus에 대한 살균소독제의 농도와 처리 시간별 살균력을 평가하여 살균예측모델 개발 및 살균소독지침의 기초자료로 제공하고자 한다. 염소계 살균소독제 100ppm처리 직후, 5분,\0분 후 E. coli( 1.56, 1.49, 1.95 log cfu/25 $cm^2$)와 S. aureus(0.49, 0.88, 1.27 log cfu/25 $cm^2$)에 대해 높은 감소율을 보였고 200ppm처리 시에는 불검출 되었다. 알콜계 살균소독제는 35.5% 처리 직후, 5분, 10분 후 E. coli(0.73, 0.90. 1.55 log cfu/25 $cm^2$), S. aureus(0.37, 1.00, 1.45 log cfu/25 $cm^2$)에 대해 높은 감소율을 보였고, 70% 5분 처리 시 불검출되었다. 과산화수소계 살균소독제는45.5 ppm 처리 직후. 5분, 10분 후 E. coli(0.28, 0.64, l.07 10g cfu/25 $cm^2$), S. aureus(0.53, 0.87, 0.99 log cfu/25 $cm^2$)에 대해 높은 살균력을 보였으나, 91 ppm 5분 처리 시 검출되지 않았다. 4급암모늄계는 100 ppm 처리 직후, 5분, 10분 후 E. coli(0.82, 1.62. 1.71 log cfu/25 $cm^2$), S. aureus(0.46, 0.93, 1.38 log cfu/25 $cm^2$)에 대한 높은 감소율을 보였으나 200 ppm 5분 처리 시 불검출 되었다. 살균예측모델의 경우, $R^2$ 값이 모두 9.4 이상으로 두 균주 모두 높은 적합성을 보였다. 기구 등의 살균소독제의 사용은 적정한 농도와 처리시간을 준수하여 야만 병원성미생물 감소에 효과적이므로 본 연구에서 개발된 4가지 주요 살균소독제의 살균예측모델을 현장에서 활용함으로써 최적의 살균소독제 처리농도와 처리시간을 추가 실험 없이 시뮬레이션으로 도출 가능할 것이다.

Keywords

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