Microbiological Safety During Delivering of Food Ingredients Supplied to Elementary School Food Services in Daegu and Gyeongbuk Provinces -Seafood, Meat and Frozen Processing Food-

대구.경북지역 학교 급식에 공급되는 식재료의 유통단계별 미생물 평가 - 어육류, 냉동가공 제품 -

  • Kim, Yun-Hwa (Department of Food and Nutrition, Daegu University) ;
  • Ryu, Kyung (Department of Food and Nutrition, Yeungnam University) ;
  • Lee, Yeon-Kyung (Department of Food Science and Nutrition, Kyungpook National University)
  • 김윤화 (대구대학교 식품영양학과) ;
  • 류경 (영남대학교 식품영양학과) ;
  • 이연경 (경북대학교 식품영양학과)
  • Published : 2009.04.30

Abstract

This study evaluated the microbiological quality and safety of food items(seafood, meat, eggs, and frozen food) supplied to elementary school food services, during delivery, and analyzed the distribution/delivery system. To this end, 10 food items supplied by 13 factories in Daegu and Gyeongbuk were chosen for study. Beef and pork were delivered directly to schools in freezer vans. Seafood, chicken, and frozen food were delivered to schools by refrigerated vans(${\leq}10^{\circ}C$) that made other delivery stops before arriving at schools. After food was delivered to schools, total bacterial counts and coliforms(respectively) were as follows: mackerel($2.0{\times}10^2-3.2{\times}10^5$, $<5-4.0{\times}10^3CFU/g$), common squid($2.5{\times}10^4-6.6{\times}10^5$, $1.6{\times}10^2-6.0{\times}10^3CFU/g$), shellfish($3.2{\times}10^5-1.7{\times}10^3$, $4.0{\times}10^3-3.0{\times}10\;CFU/g$), boiled fish paste($1.9{\times}10^4$, <5 CFU/g), beef($9.2{\times}10^2-6.4{\times}10^4$, $<5-2.0{\times}10\;CFU/g$), pork($2.6{\times}10^3-1.3{\times}10^6$, $<5-2.7{\times}10^2CFU/g$), chicken($1.0{\times}10^4$, $2.4{\times}10^2CFU/g$), egg($<5-2.3{\times}10^2$, <5 CFU/g), frozen mandu($3.2{\times}10^3-9.5{\times}10^4$, <5 CFU/g), and frozen noodles($<5-9.0{\times}10$, <5 CFU/g). Bacillus cereus($2.0{\times}10\;CFU/g$) and E. coli($1.0{\times}10\;CFU/g$) were detected on shellfish, and Staphylococcus aureuswas detected on pork($3.1{\times}10\;CFU/g$) and chicken($7.8{\times}10\;CFU/g$). Most food items were double-wrapped in vinyl and placed in corrugated cardboard boxes prior to delivery, and the boxes weremixed with other food items when they were put in the vans. There was no cross-contamination during distribution. However, total shellfish bacterial counts increased slightly. These results indicate that foods need to be completely pasteurized during processing. Frozen food items should not be mixed and should be delivered by freezer vans(${\leq}4^{\circ}C$). The number of stops made during distribution/delivery should be reduced.

이 연구의 목적은 대구 경북지역 초등학교에 공급되는 냉장, 냉동유통 제품인 어육류와 냉동가공제품의 유통단계를 분석하고, 유통과정에서의 미생물 변화와 학교급식에 이용되는 식재료의 미생물 품질 평가를 위하여 실시되었다. 쇠고기와 돼지고기는 가공업체에서 학교로 냉동차량을 이용하여 직배송 되었으나 다른 어육류와 냉동가공제품들은 농산물과 함께 직납업체를 거쳐 냉장(${\leq}10$)으로 혼재 배송되고 있었다. 학교 도착 후 일반세균과 대장균군의 수는 각각 절단생선 $2.0{\times}10^2{\sim}3.2{\times}10^5$, $<5{\sim}4.0{\times}10^3CFU/g$, 오징어 $2.5{\times}10^4{\sim}6.6{\times}10^5$, $1.6{\times}10^2{\sim}6.0{\times}10^3CFU/g$, 깐 조개류 $3.2{\times}10^5{\sim}1.7{\times}10^3$, $4.0{\times}10^3{\sim}3.0{\times}10\;CFU/g$, 어묵 $1.9{\times}10^4$, <5 CFU/g, 쇠고기 $9.2{\times}10^2{\sim}6.4{\times}10^4$, $<5{\sim}2.0{\times}10\;CFU/g$, 돼지고기 $2.6{\times}10^3{\sim}1.3{\times}10^6$, $<5{\sim}2.7{\times}10^2CFU/g$, 닭고기 $1.0{\times}10^4$, $2.4{\times}10^2CFU/g$, 난류 $<5{\sim}2.3{\times}10^2$, <5 CFU/g, 냉동만두류 $3.2{\times}10^3{\sim}9.5{\times}10^4$, <5 CFU/g, 냉동면류 $<5{\sim}9.0{\times}10$, <5 CFU/g 이었으며, 깐조개에서 E. coli와 B. cereus가 각각 $1.0{\times}10$, $2.0{\times}10\;CFU/g$ 검출되었고, 돼지고기, 닭고기에서 S. aureus 각각 $3.1{\times}10$, $7.8{\times}10\;CFU/g$ 검출되었다. 대부분의 식재료들이 비닐과 박스로 이중 포장되어 배송되었고, 유통과정에서 교차오염은 없었으며, 냉장으로 배송되는 수산물에서 일반세균이 소량 증가하였다. 이번 조사를 통하여 학교급식 식재료의 안전한 관리를 위해서는 식재료의 제조 가공 단계에서의 철저한 위생관리가 먼저 선행되어야 하고, 냉동식품과 냉장식재료의 혼재 배송되는 것을 막고, 철저한 온도관리가 이루어지도록 하기 위해서는 유통단계에서의 위생인증과 유통단계를 줄일 수 있는 제도적인 방안이 요구되었다.

Keywords

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