The Yersinia genus covers a vast range of bacteria that are distinguished by criteria such as whether or not they are able to cause disease (their pathogenicity). For instance, Yersinia pestis causes plague, while the bacteria Yersinia enterocolitica and Yersinia pseudotuberculosis are responsible for bowel diseases. Researchers at the Institut Pasteur have developed a new genomic analysis method for classifying and identifying all Yersinia strains and estimating their pathogenicity.

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