Antimicrobial Resistance Patterns and Resistance genes assay of Shigella sonnei Isolated in Korea for Five Years

최근 5년 동안 국내에서 분리된 Shigella sonnei의 항균제 내성 유형과 내성유전자형 분석

  • Huh, Wan (Gyeong Sang Buk-Do Institute of Health and Environment,) ;
  • Lee, Sang-Jo (Gyeong Sang Buk-Do Institute of Health and Environment,) ;
  • Kwon, Gi-Seok (School of Bioresource Science, Andong National University) ;
  • Jang, Jong-Ok (School of Bioresource Science, Andong National University) ;
  • Lee, Jung-Bok (School of Bioresource Science, Andong National University)
  • 허완 (경상북도 보건환경연구원) ;
  • 이상조 (경상북도 보건환경연구원) ;
  • 권기석 (안동대학교 자원환경학과) ;
  • 장종옥 (안동대학교 자원환경학과) ;
  • 이중복 (안동대학교 자원환경학과)
  • Published : 2007.03.31

Abstract

This study has been carried out for investigating the relatedness of representative 135 Shigella sonnei strains isolated from 2000 to 2004 by using biotyping and antimicrobial resistance. All strains showed typical biochemical characterisics of Shigella strain. Among 135 strains,79 (58.5%) strains were biotype "g",54 (40.0%) strains were biotype "a" and 2 (1.5%) strains were biotype "e". The results of susceptibility test against 16 antimicrobial agents were like this. Most of strains were susceptible to AN, CIP, C and GM. 129 (95.6%) strains were resistant to SXT, 126 (93.3%) strains were resistant to TE and 122 (90.4%) strains were resistant to SM. One hundred thirty two (97.8%) strains were resistant to more than two antimicrobial agents. R28 type (antimicrobial resistance patterns 28: resistant to AM, SAM, TE, TIC, SXT, K, SM and AmC) were 42 strains (31.1%). The other strains were showed 33 kinds of R patterns. The results of $bla_{TEM}$, sulII, tetA and strA gene detection were coincided with phenotype of antimicrobial resistance by disk diffusion method. But some strains which had sulII and strA genes were not showed the resistance against SXT and SM.

2000-2004년 국내에서 분리된 S. sonnei 135주를 선별하여 16종의 항균제 내성 유형, $bla_{TEM}$, suulII, tetA, strA등의 내성유전자형을 PCR등의 방법으로 항생제내성 표현형과 유전자형의 유연관계를 파악하였다. 균주들의 생화학적 성상은 전형적 인 이질성 세균의 특성을 나타내었으며, biotyping에서는 g type이 58.5%(79주), a type이 40.0%(54주), e type이 1.5%(2주)로 나타났다. 항균제 16종의 항균제 내성 패턴은 AN, CIP, C, GM등의 약제에는 감수성을 보였으나, SXT 약제에는95.6% (129주), TE 약제에는 93.3% (126주), SM에는 90.4% (122주)등의 순으로 내성을 나타내었다. 두 가지 이상 약제 내성균이 97.8% (132주), 그 중에서 R28 (AM, SAM, TE, TIC, SXT, K, SM, AmC : 8제 약제 내성) 형이 31.1% (42주)를 차지하였으며, 33가지 형태의 다양한 내성 패턴을 나타내었다. $bla_{TEM}$, sulII, tetA 및 strA등의 내성유전자 분포에서는 Disk diffusion법에서 내성을 보인 경우에는 모두 각각의 유전자 증폭산물이 검출되었다.

Keywords

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