CTX-M- and pAmpC-Encoding Genes Are Associated with Similar Mobile Genetic Elements in Isolated from Different Brands of Brazilian Chicken Meat.

In this study we characterized the genetic environment of and genes carried by 46 isolates obtained from 20 chicken carcasses produced by five different brands in Brazil, including exporters and antibiotic-free-certified producers, purchased between 2010 and 2014. Similar plasmids characterized according to size and incompatibility group (Inc) were identified in belonging to different MLST-ST collected, regardless of carcass brand or production system. Hybridization assays with transconjugant strains revealed that gene ( = 19) was located on 85 kb plasmids of IncB/O, IncI1, IncFIB, or nontypeable groups.