Comparative Genomic Analysis of a Multidrug-Resistant Strain YH002 Isolated from Retail Beef Liver.

is a major cause of bacterial gastroenteritis worldwide. In this study, we report the comparative genomic and functional characteristics of YH002 recently isolated from retail beef liver. Whole-genome sequencing and annotation of the strain revealed novel genetic features, including an integrated intact phage element, multiple antimicrobial resistance (AMR) genes, virulence factors, and a Phd-Doc type toxin-antitoxin (TA) system. Phenotypic tests of AMR showed that YH002 was resistant to amoxicillin and tetracycline, which correlates with the AMR genes found in the strain. Comparative analysis of cell motility at genotypic and phenotypic levels identified discernible patterns of amino acid changes, which could explain the variations of motility among strains. Together, these results provide important clues to the genetic mechanisms of AMR and cell motility in . The finding of a Phd-Doc TA system in the genome of YH002 is the first report of this TA system in spp.