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大肠杆菌O18:K1:H7和东方型鼠疫耶尔森氏菌中保守的丝状原噬菌体。

Conserved filamentous prophage in Escherichia coli O18:K1:H7 and Yersinia pestis biovar orientalis.

作者信息

Gonzalez Mark D, Lichtensteiger Carol A, Caughlan Ruth, Vimr Eric R

机构信息

Laboratory of Sialobiology, Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802, USA.

出版信息

J Bacteriol. 2002 Nov;184(21):6050-5. doi: 10.1128/JB.184.21.6050-6055.2002.

Abstract

Microbial virulence is known to emerge by horizontal gene transfer mechanisms. Here we describe the discovery of a novel filamentous prophage, designated CUS-1, which is integrated into the chromosomal dif homologue of the high-virulence clone Escherichia coli O18:K1:H7. An homologous chromosomal element (CUS-2) in Yersinia pestis biovar orientalis is integrated at the same relative location as CUS-1; both lysogenic E. coli and Y. pestis strains produce particles with properties expected of single-stranded DNA virions. CUS(phi) is epidemiologically correlated with the emergence of K1 strains with increased virulence and with the Y. pestis biovar responsible for the current (third) plague pandemic.

摘要

已知微生物毒力通过水平基因转移机制产生。在此,我们描述了一种新型丝状原噬菌体CUS-1的发现,它整合到高毒力克隆大肠杆菌O18:K1:H7的染色体dif同源物中。鼠疫耶尔森氏菌东方生物变种中的一个同源染色体元件(CUS-2)与CUS-1整合在相同的相对位置;溶源性大肠杆菌和鼠疫耶尔森氏菌菌株均产生具有单链DNA病毒粒子预期特性的颗粒。CUS(phi)在流行病学上与毒力增强的K1菌株的出现以及导致当前(第三次)鼠疫大流行的鼠疫耶尔森氏菌生物变种相关。

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