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Can J Microbiol. 2012 Apr;58(4):547-51. doi: 10.1139/w2012-002. Epub 2012 Mar 12.

Distribution of the vanG-like gene cluster in Clostridium difficile clinical isolates.

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EA 4043, USC INRA, Département de Microbiologie, Université Paris Sud, Châtenay-Malabry, France.


Treatment of Clostridium difficile infections generally requires cessation of their causative antibiotic and subsequent administration of metronidazole or vancomycin. Intriguingly, the genome of C. difficile 630 contains a cryptic gene cluster homologous to the vanG-type operon of Enterococcus faecalis BM4518. We detected this cluster by PCR in 35 out of 41 clinical isolates, confirming its large prevalence in this species. The cluster was found to be located in a unique locus. Comparison of this locus with that of strains devoid of the vanG-like cluster indicated that acquisition of the gene cluster occurred in a perfect 19-bp inverted repeat, in the absence of a detectable mobile structure.

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