Mobile genetic elements provide evidence for a bovine origin of clonal complex 17 of Streptococcus agalactiae

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.
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Applied and Environmental Microbiology, American Society for Microbiology, 2007, 73 (14), pp.4668-4672. 〈10.1128/AEM.02604-06〉
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Geneviève Héry-Arnaud, Guillaume Bruant, Philippe Lanotte, Stella Brun, Bertrand Picard, et al.. Mobile genetic elements provide evidence for a bovine origin of clonal complex 17 of Streptococcus agalactiae. Applied and Environmental Microbiology, American Society for Microbiology, 2007, 73 (14), pp.4668-4672. 〈10.1128/AEM.02604-06〉. 〈hal-00557613〉

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