Fluoroquinolone resistance is an emerging problem in companion animal practice. The
present study aimed to determine comparative fluoroquinolone minimum inhibitory
concentrations (MICs) for enrofloxacin, marbofloxacin and pradofloxacin and identify
plasmid-mediated quinolone resistance (PMQR) mechanisms in 41 multidrug-resistant
(MDR) Escherichia coli isolates representing three main clonal groups (CGs) cultured from
extraintestinal infections in dogs. All isolates were resistant to fluoroquinolones and the …