Bacterial isolates used in this study and their characteristics.

AAntimicrobial abbreviations: chloramphenicol (Chl), tetracycline (Tet), ceftriaxone (Axo), ceftiofur (Tio), cefoxitin (Fox), ampicillin (Amp), amoxicillin/clavulonic acid (Amc), kanamycin (Kan), streptomycin (Str), sulfamethoxazole (Sul) and trimethoprim/sulfamethoxzole (Sxt).BPlasmid Incompatibility (Inc) group.CPlasmid sequence was not able to be fully assembled due to lack of coverage (typically 2–4 fold), the size was estimated following gel electrophoresis of isolated plasmid DNA and the detection of genes present were based on the mapping of unassembled sequence reads to a series of IncA/C reference sequences (AB277723, AB571791, CP000603, CP000604, FJ621586, HQ02386, and JF14412).