Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Prevalence and Frequency of Food-borne Pathogens on Unprocessed Agricultural and Marine Products

비가공 농수산 식품소재의 미생물 오염분석

  • Kim, Soo-Hwan (Department of Food Science and Biotechnology, Kyungwon University) ;
  • Kim, Jong-Shin (Department of Food Science and Biotechnology, Kyungwon University) ;
  • Choi, Jung-Pil (Department of Food Science and Biotechnology, Kyungwon University) ;
  • Park, Jong-Hyun (Department of Food Science and Biotechnology, Kyungwon University)
  • Published : 2006.08.01
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Abstract

The aim of this study was to investigate the prevalence and frequency of food-borne pathogens in unprocessed Products such as grains, tubers, vegetables, and seaweeds. Three hundred and twenty seven samples were purchased from the retail market and the supermarket in the Kyonggi-do and Seoul areas, and washed with running tap water for 4 minutes. The total aerobic bacteria count was approximately 2 to 6 log CFU/g and the highest counts were 6 log CFU/g far lettuce and sesame leaf. The coliform count showed 1-5 log CFU/g and the highest counts were 4 log CFU/g for lettuce and carrot. Escherichia coli was detected in seven samples of white rice, sweet potato, lettuce, sesame leaf, and cabbage. Clostridium perfringens was detected in six samples of brown seaweed, laver, lettuce, and sweet potato. However, Bacillus cereus contamination was found in more than 30% of brown rice, carrot, sweet potato, lettuce and sesame leaf samples, and some of these showed contamination of more than 2.0 log CFU/g. Therefore, these results suggest that pretreatment with sanitizer to remove Bacillus cereus in such products is necessary.

최근 건강식품의 선호에 따라 비가열 신선 식품과 최소가공 식품의 소비가 증가하면서 식품소재의 미생물오염은 식품 위생상 문제가 될 수 있다. 본 연구에서는 한국인이 일상에서 많이 섭취하고 있는 곡물류. 구근류, 야채류, 해조류 등에서 미생물 오염을 분석하였다. 수도권 지역에서 유통되는 농수산물중 쌀(27개), 현미(25개), 당근(44개), 고구마(32개), 상추(37개), 깻잎(37개), 양배추(40개), 김(33개), 다시마(25개), 미역(27개)등의 327 시료를 분석하였다. 시료를 수집후 흐르는 물에서 4분간 세척후에 미생물 오염을 분석하였다. 일반세균수는 2-6 log CFU/g로 분포되어 있었으며 시료에 따른 변화가 있었다. 특히 상추와 깻잎이 약 6.0 log CFU/g로 가장 높았으며, 미역이 약 2.0 log CFU/g로 가장 낮은 오염도를 보였다. 대장균군은 1-5 log CFU/g로 분포하고 있었으며 시료마다 변화가 있었는데, 상추와 당근이 약 4.0 log CFU/g으로 높은 오염도를 나타냈다. E. Coli는 총 327시료중 7건이 고구마, 깻잎, 쌀, 상추, 양배추에서 검출되었으며 S. aureus는 거의 검출되지 않았다. Cl. perfringens는 총 시료중 미역, 김, 상추, 고구마등에서 6건이 검출되었다. 그러나 B. cereus는 현미, 당근, 고구마, 상추, 깻잎시료에 30% 이상 오염되어 있으며 현미, 고구마, 상추, 깻잎, 양배추에서는 2.0 log CFU/g이상 검출된 시료도 있었다. 따라서 충분히 열처리하지 않고 섭취하는 식품소재에 대한 B. cereus를 제거하는 전처리가 필요함을 알 수가 있었다.

Keywords

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