Journal of Food Hygiene and Safety (한국식품위생안전성학회지)

The Korean Society of Food Hygiene and Safety (한국식품위생안전성학회)
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Antimicrobial Effect of Phytochemicals to Listeria monocytogenes Isolated from Slaughterhouses

  • Kim, Hyeji (Department of Food and Nutrition, Sookmyung Women's University) ;
  • Oh, Hyemin (Department of Food and Nutrition, Sookmyung Women's University) ;
  • Lee, Heeyoung (Risk Analysis Research Center, Sookmyung Women's University) ;
  • Kim, Sejeong (Department of Food and Nutrition, Sookmyung Women's University) ;
  • Ha, Jimyeong (Department of Food and Nutrition, Sookmyung Women's University) ;
  • Lee, Jeeyeon (Department of Food and Nutrition, Sookmyung Women's University) ;
  • Choi, Yukyung (Department of Food and Nutrition, Sookmyung Women's University) ;
  • Lee, Yewon (Department of Food and Nutrition, Sookmyung Women's University) ;
  • Kim, Yujin (Department of Food and Nutrition, Sookmyung Women's University) ;
  • Yoon, Yohan (Department of Food and Nutrition, Sookmyung Women's University) ;
  • Lee, Soomin (Risk Analysis Research Center, Sookmyung Women's University)
  • Received : 2018.05.29
  • Accepted : 2018.06.27
  • Published : 2018.08.30
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Abstract

The objective of this study was to investigate the inhibitory effect of natural antimicrobials on Listeria monocytogenes isolated from Korean slaughterhouses. A mixture of 15 strains of L. monocytogenes at low (3 Log CFU/mL) or high (7 Log CFU/mL) concentration was exposed to various extracts (grapefruit seed extract, citrus fruit extract, ginger extract, pear extract, Japanese apricot concentrate, balloon flower extract, jujube extract, and omija extract) at $0.001-4.0{\mu}g/mL$. Ginger extract, pear extract, Japanese apricot concentrate, balloon flower extract, jujube extract, or omija extract showed no antimicrobial effects on high-concentration of L. monocytogenes (7 Log CFU/mL). However, grapefruit seed extract and citrus fruit extract showed antibacterial effects against L. monocytogenes at 3 and 7 Log CFU/mL with MBCs of 0.001 and $0.002{\mu}g/mL$, respectively. These results indicate that grapefruit seed extract and citrus fruits extract can be used to control L. monocytogenes as natural antimicrobials.

본 연구에서는 도축장에서 분리된 Listeria monocytogenes를 저해할 수 있는 식물성 항균 물질을 탐색하고, 각 항균 물질의 최소살균농도(MBC)를 확인하였다. 잠재적인 항균 물질로 자몽종자 추출물, 감귤류 추출물, 생강 추출물, 배 추출물, 매실 농축액, 도라지 추출물, 대추 추출물, 오미자 추출물을 선정하였고, 대상 균주로는 국내 도축장에서 분리한 15 개의 L. monocytogenes 균주를 혼합하여 사용하였다. MBC 확인 결과, 최대 $4.0{\mu}g/mL$ 농도의 생강 추출물, 배 추출물, 매실 농축액, 도라지 추출물, 대추 추출물, 오미자 추출물은 고농도의 L. monocytogenes (7 Log CFU/mL)에 대해 균 저해 효과가 전혀 나타나지 않았다. 반면, 7 Log CFU/mL의 L. monocytogenes에 대한 자몽종자 추출물과 감귤류 추출물의 MBC는 $0.002{\mu}g/mL$인 것으로 확인되었다. 3 Log CFU/mL의 L. monocytogenes에 대한 MBC를 시험해 본 결과, 자몽종자 추출물과 감귤류 추출물의 MBC는 $0.001{\mu}g/mL$로 나타났다. 이상의 결과로 볼 때 자몽종자 추출물과 감귤류 추출물은 L. monocytogenes를 제어하기 위해 적용될 수 있을 것으로 판단된다.

Keywords

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