최근 경북지역 설사환자 검체에서 분리된 Vibrio cholerae O1의 분자생물학적 특성

Molecular Biological Characteristics of Vibrio cholerae O1 Isolated from Diarrheal patients in the Gyeongbuk province.

  • 이상조 (경북 보건환경연구원 미생물과) ;
  • 이복권 (국립보건원 세균질환부 장내세균과) ;
  • 이건주 (안동대학교 생물학과) ;
  • 이희무 (안동대학교 생물학과)
  • 발행 : 2003.12.01

초록

2001년 경북지역 콜레라 유행시 설사환자에서 V. cholerae O1 El Tor형 90주를 분리하였다. 분리균을 대상으로 ctxA, tcpA, hlyA gene에 대한 multiplex-PCR 시험에서는 분리균 모두에서 302, 223, 471 bps크기의 DNA 증폭산물 band를 확인하였다. ctxA 및 ctxB gene 부위의 유전자 염기서열 비교에서 분리균과 GenBank에 수록된 균간의 유형의 차이를 보였다. PFGE typing 실험에서는 분리균 모두에서 동일한 amplicon 단편을 나타내었다. 또한, 2002년 8월부터 10월까지 콜레라균 서식가능성 규명을 위해 경북 동해안 일대에서 plankton 시료채취 및 V. cholerae O1 및 V. cholerae O139의 rfb 및 CT gene 검출을 위한 multiplex-PCR 확인실험에서는 ctxA gene의 DNA band는 일부 검출되었으나, V. cholerae O1 및 V. cholerae O139는 분리되지 않았다. 험에서 ctxA gene DNA band는 검출되었으나, V. cholerae O1 및 V. cholerae O1는 분리되지 않았다.

This study was carried out to investigate the cause of cholera outbreak in Gyeongbuk province in 2001.90 strains of Vibrio cholerae O1 El Tor serotype Inaba were isolated from diarrheal patients. By multiplex-PCR, all of the isolated strains revealed positive for detection ctxA, hlyA and tcpA genes. There were DNA sequence difference of the cholera-toxin subunit A gene and subunit B gene between isolated V. cholerae O1 and the strain of GenBank. In analysis of PFGE patterns, all of the isolated strains were showed the same DNA fragments. We also collected plankton samples in the east coast of Gyeongbuk to isolate V. cholerae O1 and V. cholerae O139 from August to October 2002. The samples were examined to detect the rfb gene and cholera-toxin gene by multiplex-PCR. The cholera-toxin gene was detected and then we tried to isolate V. cholerae O1 and V. cholerae O139, but they were not isolated.

키워드

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