미생물학회지 (Korean Journal of Microbiology)

  • 제45권2호
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  • Pages.163-169
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  • 2009
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  • 0440-2413(pISSN)
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  • 2383-9902(eISSN)
한국미생물학회 (The Microbiological Society of Korea)
권호 표지

부산 민락동 오수처리장에서 분리된 장내세균 Klebsiella pneumoniae와 Escherichia coli가 생성한 광범위 베타 락탐(Extended-Spectrum $\beta$-Lactamase, ESBL) 분해효소의 유형

The Types of Extended-Spectrum $\beta$-Lactamase (ESBL) Produced by Enteric Bacteria, Klebsiella pneumoniae and Escherichia coli Isolated from Sewage of Wastewater Treatment Plant at Minragdong in Busan, Korea

  • 이훈구 (부경대학교 자연과학대학 미생물학과)
  • Lee, Hun-Ku (Department of Microbiology, College of Natural Sciences, Pukyong National University)
  • 투고 : 2009.05.21
  • 심사 : 2009.06.23
  • 발행 : 2009.06.30
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초록

본 논문은 부산소재 하수처리장 중계시설인 민락오수처리장의 하수에서 광범위 베타 락탐 분해효소(extendedspectrum $\beta$-lactamase, ESBL) 생성균주를 분리 동정하고 이들이 생성한 ESBL 유형을 조사하였다. 민락오수처리장은 부산 남구 수영구의 민락동 일대에 밀집한 횟집의 하수를 모아서 남구 용호동에 있는 하수종말처리장으로 중계시키는 시설이다. 2009 년 1 월 하수 검체로부터 항균제 이중 디스크 확산 시험(double disk synergy test)에 양성반응을 나타낸 19 균주를 1차 시험균주로 선택하였다. 인돌생성 시험 methyl-red, Voges-Proskauer, Simmon's citrate, decarboxylase-dihydrolase 및 당 발효능 생화학 시험을 통하여 Klebsiella pneumoniae (3 균주)와 Escherichia coli (16 균주)가 동정되었다. 이 균들을 공여균주로, Escherichia coli J53 (sodium $azide^r$)를 피전달균주로 하여 접합시험을 실시하여 plasmid로 매개된 4 균주 접합체를 얻었다. 이들로부터 plasmid를 추출하여 PCR로 유전자 증폭을 시켜 유전자를 분석하고 등전점을 조사한 결과 Klebsiella pneumoniae에서 생성된 ESBL 유형은 모두 SHV-12 (3 균주)였고, Escherichia coli에서 생성된 ESBL 유형은 SHV-12/TEM-1 (1 균주)였다.

This study was performed to investigate the type of extended-spectrum $\beta$-lactamases (ESBL) produced by bacteria isolated from the sewage of wastewater treatment plant at Minragdong, Suyong-gu in Busan. The facility is located at sushi restaurants and guides its drain water to the wastewater treatment plant at Yonghodong, Nam-gu in Busan. Samples were collected on January, 2009. A total of 19 strains were selected as potential ESBL positive strains through a double disk synergy test. On the basis of the results from biochemical tests including indole, methyl-red, Voges-Proskauer, Simmon's citrate, decarboxylase-dihydrolase and sugar-fermentation tests, the 19 strains were identified with 16 strains of Escherichia coli and 3 strains of Klebsiella pneumoniae. Out of 19 strains, 4 transconjugants against Escherichia coli J53, which is sodium azide resistant recipient strain, were obtained. The plasmids isolated from transconjugants were used for PCR analysis. The type of each extended-spectrum $\beta$-lactamase (ESBL) produced by the strains was determined on the basis of isoelectric focusing analysis and DNA sequencing. The results indicated that the types of ESBL from Klebsiella pneumoniae were SHV-12 (3 strains), and Escherichia coli was SHV-12/TEM-1 (1 strain), respectively.

키워드

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