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Microbial quality of fresh vegetables in restaurants around school

학교주변식당 신선 채소류의 미생물 오염도 조사

  • Jo, So Hyun (Department of Food Science and Technology and Functional Food Research Center, Chonnam National University) ;
  • Chung, Hyun-Jung (Department of Food and Nutrition, Inha University) ;
  • Lee, Seong Hee (Department of Nutrition and Culinary, Chosun College of Technology) ;
  • Hwang, Su Jung (Faculty of Herbal Food Cuisine and Nutrition, Daegu Hanny University) ;
  • Om, Ae-Son (Department of Food and Nutrition, Hanyang University) ;
  • Eun, Jong-Bang (Department of Food Science and Technology and Functional Food Research Center, Chonnam National University)
  • 조소현 (전남대학교 식품공학과, 기능성식품연구센터) ;
  • 정현정 (인하대학교 식품영양학과) ;
  • 이성희 (조선이공대학교 식품영양조리과학과) ;
  • 황수정 (대구한의대학교 한방식품조리영양학부) ;
  • 엄애선 (한양대학교 식품영양학과) ;
  • 은종방 (전남대학교 식품공학과, 기능성식품연구센터)
  • Received : 2013.04.12
  • Accepted : 2013.04.23
  • Published : 2013.06.30

Abstract

Microbiological contamination of 4 vegetables (garlic, red pepper, perilla leaf and lettuce) collected from 10 restaurants around university was examined. The vegetables were evaluated for total plate count, coliforms, psychrophiles, yeast, and Staphylococcus aureus. The results of total plate count showed the highest value as $5.4{\pm}0.69$ log CFU/g in lettuce, following by $4.8{\pm}1.53$ log CFU/g in red pepper, $4.5{\pm}1.65$ log CFU/g in perilla leaf and $3.4{\pm}1.27$ log CFU/g in garlic. The contamination level of coliforms and psychrophiles were highest in red pepper with maximum as 4.7 log CFU/g and 8.2 log CFU/g, respectively. Red pepper of psychrophiles showed the highest average value as $5.0{\pm}1.82$ log CFU/g followed by $4.2{\pm}1.91$ log CFU/g in lettuce, $4.7{\pm}1.55$ log CFU/g in perilla leaf and $2.4{\pm}2.10$ log CFU/g in garlic. The average number of yeasts were highest in perilla leaf with $4.4{\pm}1.41$ log CFU/g and were lowest in garlic with $0.9{\pm}1.41$ log CFU/g. The contamination level of S. aureus was detected in 27 samples among the total 40 samples with the range of 0.5-5.2 log CFU/g. In conclusion, the microbial quality of the fresh vegetables evaluated in this study was not very good. Therefore, it needs to be enhanced through the good sanitation management and production and distribution methods to improve the safety of fresh vegetables.

본 연구는 채소류의 미생물학적 오염도를 조사하기 위하여 학교 주변 식당 10곳에서 채취한 마늘, 고추, 깻잎, 상추를 대상으로 하여 총세균, 대장균군, 저온균, 효모, 황색포도상구균의 오염도 수준을 분석하였다. 총세균의 경우, 상추는 평균 $5.4{\pm}0.69$ log CFU/g, 마늘은 $3.4{\pm}1.27$ log CFU/g로 상추>고추>깻잎>마늘 순으로 높게 나타났고, 조사한 식당의 절반이 넘는 식당에서 채취한 모든 시료에서 대장균 군이 검출되었다. 저온균은 고추, 상추, 깻잎, 마늘 순으로 높게 나타나 각각 평균 $5.0{\pm}1.82$ log CFU/g, $4.2{\pm}1.91$ log CFU/g, $4.7{\pm}1.55$ log CFU/g, $2.4{\pm}2.10$ log CFU/g로 나타났다. 효모는 깻잎이 평균 $4.4{\pm}1.41$ log CFU/g의 오염 수준으로 가장 높게 나타났으며 마늘은 평균 $0.9{\pm}1.41$ log CFU/g으로 가장 낮은 오염 수준으로 나타났다. 황색포도상구균의 오염 수준은 총 40개의 시료 중 27개의 시료에서 0.5~5.2 log CFU/g의 범위에 걸쳐 검출되어 본 연구에서 수집한 27개의 시료 중 22개의 시료가 식품공전의 규정 기준보다 높은 수의 황색포도상구균에 오염된 것으로 나타났다. 따라서 안전한 채소류를 섭취하여, 채소류 섭취로부터 발생할 수 있는 식중독 사고를 예방하기 위해서는 더 위생적이고 체계적인 관리가 필요하다고 사료된다.

Keywords

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