Typing of Extended-Spectrum ${\beta}$-Lactamase (ESBL) Producing Enterobacteriaceae Isolated from Slaughterhouse in Pusan, Korea

부산 도축장에서 분리된 광범위 베타 락탐 분해효소(Extended-Spectrum ${\beta}$-Lactamase, ESBL)생성 장내세균의 형별분류

  • Lee Hun-Ku (Department of Microbiology, Pukyong National Univ.)
  • 이훈구 (부경대학교 자연과학대학 미생물학과)
  • Published : 2006.06.01

Abstract

The emergence of extended spectrum ${\beta}$-lactamase producing bacteria is causing very serious problems in Korea. Although there have been many reports about these bacteria Isolated from patients and clinical specimens, there is no report of extended spectrum ${\beta}$-lactamase producing organisms isolated from natural environment in Korea. This study was conducted to investigate the biological characteristics and extended spectrum ${\beta}$-lactamase types of eighteen strains of extended spectrum ${\beta}$-lactamase producing Klebsiella pneumoniae and Escherichia coli isolated from a slaughterhouse in Pusan in Korea during 2002 to 2004. Extended spectrum ${\beta}$-lactamases were identified by double-disk synergy test, conjugation, isoelectric focusing values and gene sequencing. Eight strains of Klebsiella pneumoniae and two strains of Eschericha coli were isolated kom pigs and transferred extended spectrum ${\beta}$-lactamase genes to recipient Escherichia coli J53 (sodium azide resistant and ceftazidime senstive) strain by conjugation. The conjugants of extended spectrum ${\beta}$-lactamase genes were alignments and translated to amino acids by BCM and NCBI blast. Eight conjugants of Klebsiella pneumonae were typed TEM-52, and two strains of Escherichia coli, SHV-12, but CMY-1 type were not detected in this study.

본 연구에서는 도축장과 도축물에서 plasmid 매개성 광범위 ${\beta}$-lactam (extended spectrum ${\beta}$-lactamase) 분해효소를 생성하는 Klebsiella pneumoniae와Escherichia coli가 분리됨으로서 한국에서는 이들 균주가 임상범위를 넘어 자연계까지 확산되었음을 확인하였다. 디스크 확산 시험, 등전점 수치, 접합시험 등을 통하여 돼지의 분변으로부터 최종 10균주의 접합자를 얻었고 이들의 형별결정은 아미노산서열분석과 기준주와 대조등을 BCM Search Laucncher 및 NCBI blast를 통해 이루어졌다. 광범위 ${\beta}$-lactam 유형은 Klebsiella pneumoniae 8균주가 TEM-52형이었고 2균주 Escherichia coli가 SHV-12형이었다. CMY-1형은 본 연구에서 분리되지 않았다.

Keywords

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