Characterization of blaTEM-52-Carrying Plasmids of Extended-Spectrum-β-Lactamase-Producing Salmonella enterica Isolates from Chicken Meat with a Common Supplier in Japan

摘要

The acquisition of resistance to cephalosporins among Salmonella spp. is a major public health concern. This study identified clonal plasmids carrying blaTEM-52 from 10 Salmonella enterica serovar Infantis and Manhattan isolates from retail chicken meats that originated from a common supplier in Japan. Whole-genome analyses of the representative plasmids, including pYM4, revealed that they are 38 kb in size and that pYM4 is identical to pDKX1 from beef in Denmark, suggesting a global dissemination of resistance mediated by the plasmids.