한국미생물·생명공학회지 (Microbiology and Biotechnology Letters)

  • 제41권1호
  • /
  • Pages.96-104
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  • 2013
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  • 1598-642X(pISSN)
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  • 2234-7305(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
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식품에서 분리한 황색포도상구균의 항생제 내성 특징 및 균막 형성

Antibiotic Resistance and Bacterial Biofilm Formation by Staphylococcus aureus Strains Isolated from Various Foods

  • 이주영 (한국식품연구원 식품분석센터) ;
  • 왕해진 (한국식품연구원 식품분석센터) ;
  • 신동빈 (한국식품연구원 식품분석센터) ;
  • 조용선 (한국식품연구원 식품분석센터)
  • 투고 : 2012.08.30
  • 심사 : 2012.11.13
  • 발행 : 2013.03.28
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초록

2006년부터 2008년까지 다양한 식품에서 분리한 황색포도상구균 275균주에서 하나 이상의 항생제에 내성을 보인 균주는 259주(94.2%)이며 benzyl penicillin(P)이 92.0%로 가장 높은 내성률을 보였다. 106(40.7%) 균주가 2가지 이상의 항생제에 대하여 내성을 나타났으며 3가지 이상 항생제에 내성을 보인 균도 36주(13.8%)였다. Vancomycin에 대해서는 내성을 보인 균주는 없었다. 식품별로는 초밥과 김밥에서 검출된 균주는 8종류의 항생제에 각각 내성을 나타냈으며 MRSA 균주는 11주(전체 275주)가 4% 검출되었다. Oxacillin 내성균은 다제 내성 균주였다. Automated repetitive sequences based PCR microbial typing system(DiversiLab)으로 oxacillin 내성이 있거나 다제 내성인 20주에 대해 유형을 분석한 결과 DiversiLab Analysis Tool for Typing Reports 24529에 의해 90% 이상의 상동성은 2개의 Cluster과 4개의 unique type으로 구분되었다. Congo red agar에 의한 slime production assay로 균막 형성에 대한 양성 결과 균막 형성 양성은 275균주 중 67균주로 24.4%, biofilm assay로 균막 양성인 균주는 30.5%이며 초밥에서 분리한 균주가 34.5%로 가장 많이 형성 되었다. 항생제 내성과 균막 형성율과의 상관관계를 분석해 보면 slime 형성 균주는 fusidic acid(FA), mupirocin(MUP)의 단일 항생제의 내성과 통계적 의미를 확인할 수 있었다(p < 0.05). 다제 내성균의 수와 균막 형성은 상관 관계가 없었다.

Staphylococcus aureus is a major human pathogen that produces a wide array of toxins, leading to a number of adverse symptoms. We examined 275 strains of Staphylococcus aureus isolated from various foods between 2006 and 2008 for antimicrobial susceptibility. At least 259 (94.2%) of the tested strains showed antibiotic resistant properties, and 106 (40.7%) of them showed multiple antibiotic resistance. Eleven of the tested strains were resistant to oxacillin and mec A-positive. Moreover, oxacillin-resistant strains were significantly more likely to be multi-drug resistant (p < 0.01). Of the 275 isolates tested, 24.4% were noted as being positive for slime production and 30.5% were positive for biofilm assay. Antibiotic resistance was not associated with a significantly higher prevalence of biofilm formation. Twenty strains were classified using the DiversiLab system. Most of the strains could be classified into 2 clusters and 4 unique types. All 10 mec A-positive strains (cluster I) were grouped together into the same sub-cluster. Cluster II (6 strains) was not found to be resistant to oxacillin in this study. Although the prevalence of methicillin-resistant S. aureus in food is currently low, the risk of its transmission through the food chain cannot be disregarded.

키워드

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  3. 최근 10년 동안 일개 대학병원 상처 배양에서 분리된 포도알균의 항생제 내성 변화 연구 vol.48, pp.4, 2013, https://doi.org/10.15324/kjcls.2016.48.4.335
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