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    Signatures of Adaptation in Human Invasive Salmonella Typhimurium ST313 Populations from Sub-Saharan Africa

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    63
    Author
    Okoro, CK; Barquist, L; Connor, TR; Harris, SR; Clare, S; Stevens, MP; Arends, MJ; Hale, C; Kane, L; Pickard, DJ; ...
    Date
    2015-03-01
    Source Title
    PLoS Neglected Tropical Diseases
    Publisher
    PUBLIC LIBRARY SCIENCE
    University of Melbourne Author/s
    Dougan, Gordon
    Affiliation
    Microbiology and Immunology
    Metadata
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    Document Type
    Journal Article
    Citations
    Okoro, C. K., Barquist, L., Connor, T. R., Harris, S. R., Clare, S., Stevens, M. P., Arends, M. J., Hale, C., Kane, L., Pickard, D. J., Hill, J., Harcourt, K., Parkhill, J., Dougan, G. & Kingsley, R. A. (2015). Signatures of Adaptation in Human Invasive Salmonella Typhimurium ST313 Populations from Sub-Saharan Africa. PLOS NEGLECTED TROPICAL DISEASES, 9 (3), https://doi.org/10.1371/journal.pntd.0003611.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/259494
    DOI
    10.1371/journal.pntd.0003611
    Abstract
    Two lineages of Salmonella enterica serovar Typhimurium (S. Typhimurium) of multi-locus sequence type ST313 have been linked with the emergence of invasive Salmonella disease across sub-Saharan Africa. The expansion of these lineages has a temporal association with the HIV pandemic and antibiotic usage. We analysed the whole genome sequence of 129 ST313 isolates representative of the two lineages and found evidence of lineage-specific genome degradation, with some similarities to that observed in S. Typhi. Individual ST313 S. Typhimurium isolates exhibit a distinct metabolic signature and modified enteropathogenesis in both a murine and cattle model of colitis, compared to S. Typhimurium outside of the ST313 lineages. These data define phenotypes that distinguish ST313 isolates from other S. Typhimurium and may represent adaptation to a distinct pathogenesis and lifestyle linked to an-immuno-compromised human population.

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