Persistence of vanA-Type Enterococcus faecium in Korean Livestock After Ban on Avoparcin

Suk-Kyung Lim, Tae-Soon Kim, Hee-Soo Lee, Hyang-Mi Nam, Yi-Seok Joo, Hong-Bum Koh
2006 Microbial Drug Resistance  
Prevalence of vancomycin-resistant enterococci (VRE) was investigated in Korean livestock 4 years after the ban of avoparcin in feed additives. VRE were isolated from approximately 16.7% of the chicken samples (57 strains from 342 meat samples) and 1.9% of the pig samples (4 from 214 fecal samples). No VRE, however, was isolated from 110 bovine fecal samples. All the 61 VRE isolates were vanA-type Enterococcus faecium expressing a high-level resistance to vancomycin, and showed resistance to
more » ... ed resistance to teicoplanin as well except two poultry isolates. In addition, the VRE isolates had heterogeneous pulsed-field gel electrophoresis (PFGE) patterns of SmaI-digested DNA, although identical or closely related profiles were observed among strains isolated from the same farm. Although the chicken isolates were all poultry type with G at position 8,234 of the vanX gene, the pig isolates were all swine type with T at position 8,234 of the vanX gene.
doi:10.1089/mdr.2006.12.136 pmid:16922630 fatcat:xa4lhkc5uzh5th3xsra6qcnhha