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Antimicrobial Agents and Chemotherapy, January 2005, p. 454-456, Vol. 49, No. 1
0066-4804/05/$08.00+0     doi:10.1128/AAC.49.1.454-456.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Relationship between Copper, Glycopeptide, and Macrolide Resistance among Enterococcus faecium Strains Isolated from Pigs in Denmark between 1997 and 2003

Henrik Hasman* and Frank M. Aarestrup

Danish Institute for Food and Veterinary Research, Copenhagen, Denmark

Received 6 May 2004/ Returned for modification 16 August 2004/ Accepted 29 August 2004

A significant relationship between copper resistance (tcrB), glycopeptide resistance (Tn1546), and macrolide resistance [erm(B)] in Enterococcus faecium isolated from pigs was found. The tcrB gene was located closely upstream of the Tn1546 element. However, the continued use of copper sulfate has not been able to maintain high levels of macrolide and glycopeptide resistance.

* Corresponding author. Mailing address: Danish Institute for Food and Veterinary Research, Bülowsvej 27, DK-1790 Copenhagen V, Denmark. Phone: (45) 72 34 63 47. Fax: (45) 72 34 63 41. E-mail: hha{at}dfvf.dk.

Antimicrobial Agents and Chemotherapy, January 2005, p. 454-456, Vol. 49, No. 1
0066-4804/05/$08.00+0     doi:10.1128/AAC.49.1.454-456.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Carson, K. C., Bartlett, J. G., Tan, T.-J., Riley, T. V. (2007). In Vitro Susceptibility of Methicillin-Resistant Staphylococcus aureus and Methicillin-Susceptible Staphylococcus aureus to a New Antimicrobial, Copper Silicate. Antimicrob. Agents Chemother. 51: 4505-4507 [Abstract] [Full Text]  
  • Hasman, H., Kempf, I., Chidaine, B., Cariolet, R., Ersboll, A. K., Houe, H., Bruun Hansen, H. C., Aarestrup, F. M. (2006). Copper Resistance in Enterococcus faecium, Mediated by the tcrB Gene, Is Selected by Supplementation of Pig Feed with Copper Sulfate. Appl. Environ. Microbiol. 72: 5784-5789 [Abstract] [Full Text]  
  • Hasman, H. (2005). The tcrB gene is part of the tcrYAZB operon conferring copper resistance in Enterococcus faecium and Enterococcus faecalis. Microbiology 151: 3019-3025 [Abstract] [Full Text]  


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