Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Safety Assessment of Coagulase-Negative Staphylococci from Jeotgal, a Korean High-Salt-Fermented Seafood

젓갈 유래 Coagulase-Negative Staphylococci의 안전성 평가

  • Jeong, Do-Won (Department of Food Science and Biotechnology, Kyonggi University) ;
  • Lee, Jong-Hoon (Department of Food Science and Biotechnology, Kyonggi University)
  • 정도원 (경기대학교 식품생물공학과) ;
  • 이종훈 (경기대학교 식품생물공학과)
  • Received : 2015.01.05
  • Accepted : 2015.02.26
  • Published : 2015.03.28
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Abstract

Seventeen ampicillin-sensitive coagulase-negative staphylococci (CNS) isolates identified in jeotgal were subjected to assessments for antibiotic susceptibility and safety hazards. Fifteen of the 17 CNS strains exhibited phenotypic resistances to at least one antibiotic, and their prevailing resistance was to penicillin G. The dfrA gene for trimethoprim and tetK for tetracycline were amplified by PCR from the two strains, respectively. α-Hemolytic activity was not detected from the 17 strains, while five strains presented δ-hemolytic activity. Among the five strains, two strains exhibited β-hemolytic activity. Biofilm was formed from twelve strains. All of the tested phenotypic characteristics were expressed in a strain-specific manner.

젓갈로부터 분리된 ampicillin 감수성, coagulase 음성 Staphylococcus 속 17 균주의 항생물질내성 및 위해성을 평가하였다. 15 균주는 한 종류 이상의 항생물질에 대한 내성을 나타내었고, penicillin G 내성 균주가 가장 높은 빈도로 검출되었다. PCR 증폭에 의한 항생물질내성 유전자 존재 확인 결과, trimethoprim 내성 관련 dfrA 유전자와 tetracycline 내성 관련 tetK 유전자를 각각 보유한 두 균주가 확인되었다. α 형 용혈활성은 검출되지 않았지만, 다섯 균주가 δ 형의 용혈을 나타내었고, 그 중 두 균주는 β 형 용혈활성을 나타냈으며, 12 균주가 biofilm을 형성하였다. 본 실험에서 수행한 모든 안전성 평가 결과는 균주 특이적으로 나타났다.

Keywords

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