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Antimicrobial resistance in enterococci isolated from Turkey flocks fed virginiamycin
L A Welton1, L A Thal, M B Perri
1Department of Medicine, William Beaumont Hospital, Royal Oak, Michigan 48073, USA.
Antimicrobial Agents and Chemotherapy
|March 28, 1998
Abstract:
From 125 separate cloacal cultures from three turkey flocks fed virginiamycin, 104 Enterococcus faecium and 186 Enterococcus faecalis isolates were obtained. As the turkeys aged, there was a higher percentage of quinupristin-dalfopristin-resistant E. faecium isolates, with isolates from the oldest flock being 100% resistant. There were no vancomycin-resistant enterococci. Results of pulsed-field gel electrophoresis (PFGE) indicated there were 11 PFGE types of E. faecalis and 7 PFGE types of E. faecium that were in more than one group of flock cultures.