Quinupristin/dalfopristin resistance patterns in Enterococcus faecium isolated from chicken farms in South Korea
2011
Kim, A.R., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Cho, Y.M., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Hur, M., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Jung, B.Y., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Lim, S.K., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Jung, S.C., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Song, C.S., Konkuk University, Seoul, Republic of Korea | Lee, J.Y., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea
There are many researches about the contribution of virginiamycin use in animals to quinupristin/dalfopristin (Q/D) resistance in humans. In this study, the prevalence and mechanisms of streptogramin resistance in Enterococcus faecium from chickens were investigated. A total of 170 E. faecium isolates from 38 chicken farms was tested for antimicrobial susceptibility. Eleven (6.5%) E. faecium isolates were found to be resistant to Q/D. The vatE and ermB genes were detected in 2 (18%) and 6 (55%) of Q/D-resistant E. faecium respectively. By using pulsed-field gel electrophoresis (PFGE), 6 distinct PFGE patterns were identified. These data indicate that Q/D resistance among E. faecium from chickens remains low despite the long history of virginiamycin use. However, we have to concern over antimicrobial resistance in bacteria originated from animals, including the possibility of transfer of resistance genes from animal to human.
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