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Microbiological Quality of Fresh-Cut Produce and Organic Vegetables

신선편의 샐러드와 유기농 채소류의 미생물학적 품질 및 식중독 미생물 오염도

  • Jo, Mi-Jin (Food Safety Research Division, Korea Food Research Institute) ;
  • Jeong, A-Ram (Food Safety Research Division, Korea Food Research Institute) ;
  • Kim, Hyun-Jung (Food Safety Research Division, Korea Food Research Institute) ;
  • Lee, Na-Ri (Food Safety Research Division, Korea Food Research Institute) ;
  • Oh, Se-Wook (Department of Food Science and Human Nutrition, Kookmin University) ;
  • Kim, Yun-Ji (Food Safety Research Division, Korea Food Research Institute) ;
  • Chun, Hyang-Sook (Food Safety Research Division, Korea Food Research Institute) ;
  • Koo, Min-Seon (Food Safety Research Division, Korea Food Research Institute)
  • 조미진 (한국식품연구원 안전성 연구단) ;
  • 정아람 (한국식품연구원 안전성 연구단) ;
  • 김현정 (한국식품연구원 안전성 연구단) ;
  • 이나리 (한국식품연구원 안전성 연구단) ;
  • 오세욱 (국민대학교 식품영양학과) ;
  • 김윤지 (한국식품연구원 안전성 연구단) ;
  • 전향숙 (한국식품연구원 안전성 연구단) ;
  • 구민선 (한국식품연구원 안전성 연구단)
  • Received : 2010.05.18
  • Accepted : 2010.10.18
  • Published : 2011.02.28

Abstract

This study was performed to assess the microbiological quality and potential health risk of fresh-cut produce and organic vegetables sampled from supermarkets and department stores in Korea. A total of 96 samples comprised three types of fresh-cut produce (sprouts, mixed-vegetables, fruit) and three types of organic vegetables (lettuce, perilla leaf, green pepper). The samples were analyzed for total viable cell counts, coliforms, Enterobacteriaceae, Escherichia coli, Salmonella spp., Listeria monocytogenes, Vibrio parahaemolyticus, Bacillus cereus, and Staphylococcus aureus. The microbiological counts of fruit were very low. Sprouts were highly contaminated by total viable cell counts ($8.3{\pm}0.57$ log CFU/g), Enterobacteriaceae ($7.1{\pm}0.76$ log CFU/g), and coliforms ($4.9{\pm}0.40$ log MPN/g), and showed a high incidence level of B. cereus ($2.9{\pm}0.48$ log CFU/g). Of the fresh-cut produce analyzed, six (13.6%) mixed-vegetable salads were E. coli positive. S. aureus was detected in only one sprout sample and one mixed-vegetable salad, and its contamination levels were under 2 log CFU/g, which is appropriate for Korean standards (<3 log CFU/g) of fresh-cut produce. Of the organic vegetables, lettuces were highly contaminated by total viable cell counts ($6.4{\pm}0.74$ log CFU/g), Enterobacteriaceae ($5.7{\pm}0.98$ log CFU/g), and coliforms ($3.7{\pm}1.72$ log MPN/g). Two (13.6%) organic lettuce and one (7.1%) perillar leaf sample were E. coli positive, and S. aureus was detected in one lettuce and two perilla leaf samples. Salmonella spp., Vibrio parahaemolyticus, and Listeria monocytogenes were not detected in any of the fresh-cut produce or organic vegetables analyzed.

Keywords

microbiological quality;fresh-cut produce;organic vegetable;Enterobacteriaceae;Bacillus cereus

Acknowledgement

Supported by : 한국식품연구원

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