移动遗传元件为无乳链球菌克隆复合体17的牛源起源提供了证据。
Mobile genetic elements provide evidence for a bovine origin of clonal complex 17 of Streptococcus agalactiae.
作者信息
Héry-Arnaud Geneviève, Bruant Guillaume, Lanotte Philippe, Brun Stella, Picard Bertrand, Rosenau Agnès, van der Mee-Marquet Nathalie, Rainard Pascal, Quentin Roland, Mereghetti Laurent
机构信息
Université François-Rabelais, Faculté de Médecine, EA 3854 Bactéries et Risque Materno-Foetal, Laboratoire de Bactériologie, de Tours, 2 bd. Tonnellé, 37032 Tours, France.
出版信息
Appl Environ Microbiol. 2007 Jul;73(14):4668-72. doi: 10.1128/AEM.02604-06. Epub 2007 May 25.
Abstract
We sought an explanation for epidemiological changes in Streptococcus agalactiae infections by investigating the link between ecological niches of the bacterium by determining the prevalence of 11 mobile genetic elements. The prevalence of nine of these elements differed significantly according to the human or bovine origin of the isolate. Correlating this distribution with the phylogeny obtained by multilocus sequence analysis, we observed that human isolates harboring GBSi1, a clear marker of the bovine niche, clustered in clonal complex 17. Our results are thus consistent with the emergence of this virulent human clone from a bovine ancestor.
摘要
我们通过确定11种移动遗传元件的流行情况来研究无乳链球菌感染的生态位之间的联系，以寻求对其流行病学变化的解释。这些元件中的9种元件的流行率因分离株的人类或牛源不同而有显著差异。将这种分布与多位点序列分析得到的系统发育关系相关联，我们观察到携带GBSi1（牛生态位的一个明确标记）的人类分离株聚集在克隆复合体17中。因此，我们的结果与这种有毒力的人类克隆从牛祖先中出现的情况一致。
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