alexa Clonal group distribution of fluoroquinolone-resistant Escherichia coli among humans and companion animals in Australia.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): Platell JL, Cobbold RN, Johnson JR, Trott DJ

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Abstract OBJECTIVES: To determine the phylogenetic group distribution and prevalence of three major globally disseminated clonal groups [clonal group A (CGA) and O15:K52:H1, associated with phylogenetic group D, and sequence type ST131, associated with phylogenetic group B2] among fluoroquinolone-resistant extra-intestinal Escherichia coli isolates from humans and companion animals in Australia. METHODS: Clinical extra-intestinal fluoroquinolone-resistant E. coli isolates were obtained from humans (n = 582) and companion animals (n = 125), on Australia's east coast (October 2007-October 2009). Isolates were tested for susceptibility to seven antimicrobial agents, and for phylogenetic group, O type and clonal-group-specific single nucleotide polymorphisms by PCR. RESULTS: The fluoroquinolone-resistant isolates were typically resistant to multiple agents (median of four). Analysis revealed that clonal group ST131 accounted for a large subset of the human isolates (202/585, 35\%), but for a much smaller proportion of the companion animal isolates (9/125, 7.2\%; P
  • DOI: 10.1093/jac/dkq236
  • This article was published in J Antimicrob Chemother and referenced in Journal of Antivirals & Antiretrovirals

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