Abstract
In this study, we aimed to detect genetic elements carrying vanA in Enterococcus saigonensis VE80T isolated from retail chicken in Vietnam. The structures of vancomycin-resistance determinants and the location of vancomycin-resistance genes were detected by sequencing the vanA gene cluster, Southern hybridization analyses, and whole-genome sequence analyses. The Tn1546-related elements harboring vanA clusters, which exhibited a characteristic structure with five point mutations compared with the prototype Tn1546, were located on the 76-kb plasmid pVE80-1 of VE80T. The vanS sequence of VE80T harboring three point mutations was 100% identical to those of vancomycin-resistant enterococci isolated from poultry in Taiwan and Japan, indicating that the element may be prevalent in poultry production farms in Asia.
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