Zoonotic transfer of clostridium difficile harboring antimicrobial resistance between farm animals and humans
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AbstractThe emergence of Clostridium difficile as a significant human diarrheal pathogen is associated with the production of highly transmissible spores and the acquisition of antimicrobial resistance genes (ARGs) and virulence factors. Unlike the hospital-associated C. difficile RT027 lineage, the community-associated C. difficile RT078 lineage is isolated from both humans and farm animals; however, the geographical population structure and transmission networks remain unknown. Here, we applied whole-genome phylogenetic analysis of 248 C. difficile RT078 strains from 22 countries. Our results demonstrate limited geographical clustering for C. difficile RT078 and extensive coclustering of human and animal strains, thereby revealing a highly linked intercontinental transmission network between humans and animals. Comparative whole-genome analysis reveals indistinguishable accessory genomes between human and animal strains and a variety of antimicrobial resistance genes in the pangenome of C. difficile RT078. Thus, bidirectional spread of C. difficile RT078 between farm animals and humans may represent an unappreciated route disseminating antimicrobial resistance genes between humans and animals. These results highlight the importance of the “One Health” concept to monitor infectious disease emergence and the dissemination of antimicrobial resistance genes.
CitationKnetsch CW, Kumar N, Forster SC, Connor TR, Browne HP, Harmanus C, Sanders IM, Harris SR, Turner L, Morris T, Perry M, Miyajima F, Roberts P, Pirmohamed M, Songer JG, Weese JS, Indra A, Corver J, Rupnik M, Wren BW, Riley TV, Kuijper EJ, Lawley TD. (2018) Zoonotic transfer of Clostridium difficile harboring antimicrobial resistance between farm animals and humans. J Clin Microbiol 56:e01384-17. https://doi.org/10.1128/JCM .01384-17
PublisherAmerican Society for Microbiology
JournalJournal of Clinical Microbiology
Description© 2018 The Authors. Published by American Society for Microbiology. This is an open access article available under a Creative Commons licence. The published version can be accessed at the following link on the publisher’s website: https://doi.org/10.1128/JCM .01384-17
SponsorsWe acknowledge the Wellcome Trust (grant 098051), the United Kingdom Medical Research Council (grants PF451 to T.D.L., MR/L015080/1 to T.R.C., and MR/K000551/1to F.M., M.P., B.W.W. and T.D.L.), the Australian National Health and Medical Research Council (grant 1091097 to S.C.F.), and the Victorian Government’s Operational and Infrastructure Support Program (to S.C.F.) for financial support. C.W.K. was supported by a ZonMw grant (125020004).
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by/4.0/