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通过随机扩增多态性DNA分析揭示产肠毒素大肠杆菌O6:H16血清型的克隆性质

Clonal nature of enterotoxigenic Escherichia coli serotype O6:H16 revealed by randomly amplified polymorphic DNA analysis.

作者信息

Pacheco A B, Soares K C, de Almeida D F, Viboud G I, Binsztein N, Ferreira L C

机构信息

Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, CCS, Cidade Universitária, Brazil.

出版信息

J Clin Microbiol. 1998 Jul;36(7):2099-102. doi: 10.1128/JCM.36.7.2099-2102.1998.

Abstract

The genetic relatedness among 29 enterotoxigenic Escherichia coli strains of serotype O6:H16 was investigated by randomly amplified polymorphic DNA (RAPD) analysis. The strains were isolated in different parts of the world, displayed CS1-CS3 or CS2-CS3 profiles, and expressed heat-labile toxin (LT) and heat-stable toxin; a single strain expressed only LT. Ten RAPD types were distinguished and showed significant similarity, having on average 82% of the amplified bands in common. These results indicated that, irrespective of the different geographical origin or virulence factors, these strains belonged to a widespread clonal group.

摘要

通过随机扩增多态性DNA(RAPD)分析,研究了29株O6:H16血清型产肠毒素大肠杆菌菌株之间的遗传相关性。这些菌株分离于世界不同地区,呈现CS1-CS3或CS2-CS3图谱,并表达不耐热毒素(LT)和耐热毒素;仅有一株菌株仅表达LT。区分出了10种RAPD类型,它们显示出显著的相似性,平均共有82%的扩增条带。这些结果表明,无论地理来源或毒力因子如何不同,这些菌株都属于一个广泛分布的克隆群。

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