상추잎 즙액과 표면에서 Escherichia coli O157:H7의 생장 가능성

서지정보

ㆍ발행기관 : 한국식품위생안전성학회 ㆍ수록지정보 : 한국식품위생안전성학회지 / 26권 / 4호
ㆍ저자명 : 김원일, 정향미, 김세리, 박경훈, 김병석, 윤혜정, 윤종철, 류경열

영어 초록

This study was to evaluate the growth potential of E. coli O157:H7 in lettuce leaf extracts and on lettuce leaf surface at various temperatures. The pathogen can survive and multiply in the extracts and leaf surface of lettuce. The population of E. coli O157:H7 in the lettuce extracts reached to 4.79 log CFU/mL at 37℃. The multiplication of pathogen in lettuce extracts initiated within 10 hours of inoculation over 15℃ conditions. And it can survive in the lettuce leaf extracts at 4℃ for 100 hours at least. And this pathogen can multiply on lettuce leaf surface and the population of pathogen on the lettuce leaf surface increased to 1.82 log CFU/g at 25℃. At 37℃, the pathogen density increased to 1.53 CFU/g within 3 days after inoculation. At all temperature, irrespective of the inoculation level, similar trends in growth of E. coli O157:H7 were observed. These results emphasize the growth potential of E. coli O157:H7 in lettuce leaf extract and on lettuce leaf surface. To reduce the risk of outbreak, it is important to maintain the cold chain system during storage before the consumption.

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