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Journal of Clinical Microbiology, July 2000, p. 2774-2777, Vol. 38, No. 7
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Characterization of Glycopeptide-Resistant Enterococcus
faecium (GRE) from Broilers and Pigs in Denmark: Genetic
Evidence that Persistence of GRE in Pig Herds Is Associated with
Coselection by Resistance to Macrolides
Frank Møller
Aarestrup*
Danish Veterinary Laboratory, DK-1790
Copenhagen, Denmark
Received 24 November 1999/Returned for modification 7 February
2000/Accepted 25 March 2000
Glycopeptide-resistant enterococci (GRE) from broilers and pigs
were characterized to investigate the background for the persistence of
GRE in pig herds. All porcine isolates belonged to closely related
pulsed-field gel electrophoretic (PFGE) types, with the ermB and vanA genes located on the same
transferable genetic element. Broiler isolates belonged to different
PFGE types. The persistence of GRE in Danish pig herds after the ban of
glycopeptides may be explained by the genetic link between
ermB and vanA and coselection by use of
macrolides for treatment and growth promotion.
*
Mailing address: Danish Veterinary Laboratory,
Bülowsvej 27, DK-1790 Copenhagen, Denmark. Phone: 45 35 30 01 00. Fax: 45 35 30 01 20. E-mail: faa{at}svs.dk.
Journal of Clinical Microbiology, July 2000, p. 2774-2777, Vol. 38, No. 7
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
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