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Investigation of Microbial Contamination in Liriope platyphylla at Post Harvest Environments

맥문동(Liriope platyphylla) 수확 후 처리 환경의 위생지표세균 및 병원성 미생물 오염도 조사

  • Kim, Yeon Rok (Microbial Safety Team, Department of Agri-Food Safety, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Ha, Ji-Hyoung (Microbial Safety Team, Department of Agri-Food Safety, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Kim, Se-Ri (Microbial Safety Team, Department of Agri-Food Safety, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Park, Young Chun (Chengyang boxthorn experiment station, Chungcheong Nam Do Agricultural ginseng & medicinal institute) ;
  • Kim, Kyeong Cheol (Yeonggwang Agricultrual Technology Center) ;
  • Kim, Won-Il (Microbial Safety Team, Department of Agri-Food Safety, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Ryu, Song Hee (Microbial Safety Team, Department of Agri-Food Safety, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Kim, Hwang-Yong (Microbial Safety Team, Department of Agri-Food Safety, National Institute of Agricultural Sciences, Rural Development Administration)
  • 김연록 (농촌진흥청 국립농업과학원 농산물안전성부 유해생물팀) ;
  • 하지형 (농촌진흥청 국립농업과학원 농산물안전성부 유해생물팀) ;
  • 김세리 (농촌진흥청 국립농업과학원 농산물안전성부 유해생물팀) ;
  • 박영춘 (충청남도농업기술원 청양구기자시험장) ;
  • 김경철 (영광군농업기술센터) ;
  • 김원일 (농촌진흥청 국립농업과학원 농산물안전성부 유해생물팀) ;
  • 류송희 (농촌진흥청 국립농업과학원 농산물안전성부 유해생물팀) ;
  • 김황용 (농촌진흥청 국립농업과학원 농산물안전성부 유해생물팀)
  • Received : 2015.07.07
  • Accepted : 2016.03.28
  • Published : 2016.04.30

Abstract

This study was aimed to assess microbiological contamination level of Liriope platyphylla farms (A, B, and C) located in Cheongyang, Chungnam province. Specimens sampled from those farms and L. platyphylla tuberous roots were assessed for sanitary indication bacteria such as total aerobic bacteria, coliforms, and Escherichia coli and pathogenic bacteria such as Escherichia coli O157:H7, Listeria monocytogenes, Salmonella spp., Staphylococcus aureus and Bacillus cereus, quantitatively and qualitatively. As a result, those farms are not contaminated by E. coli O157:H7, L. monocytogenes, Salmonella spp., at all. And S. aureus was only found qualitatively from workers' gloves at a farm. As a whole, those farms (soil, harvest container, harvester, cleanser, washing water and tray) were maintained in a low level of microbiological contamination. However a cleanser was contaminated by coliforms ($4.35log\;CFU/100cm^2$), and it is required to improve farm hygiene. Microbiological contamination level of L. platyphylla tuberous root was decreased in the postharvest process including washing and drying.

총호기성균, 대장균군, Escherichia coli, Escherichia coli O157:H7, Listeria monocytogenes, Salmonella spp., Staphylococcus aureus, Bacillus cereus를 대상으로 충청남도 청양의 맥문동 재배 농가 3곳의 미생물 오염도 조사하였다. 그 결과 E. coli O157:H7, L. monocytogenes, Salmonella spp. 는 전혀 검출되지 않았으며, S. aureus는 작업자가 착용한 장갑의 일부에서만 정성적으로 검출되었다. 수확한 맥문동과 접촉가능성이 있는 주변환경(토양, 수확기, 수확용기, 세척기, 세척수, 채반 등)의 미생물 오염도가 전반적으로 낮은 것으로 조사되었는데, 다만 일부 세척기에서 대장균군이 $4.35log\;CFU/100cm^2$ 검출되어 위생관리에 유의할 필요가 있는 것으로 나타났다. 맥문동은 수확 이후에 세척과정과 건조 과정을 거치면서 미생물 오염도(총호기성균, 대장균군, B. cereus)가 감소하는 것으로 나타났다.

Keywords

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