Antimicrobial growth promoter ban and resistance to macrolides and vancomycin in enterococci from pigs.
Ninety-six enterococcus isolates from fecal samples of pigs receiving tylosin as an antimicrobial growth promoter and 59 isolates obtained in the same farms 5 to 6 months after the ban of antimicrobial growth promoters in Switzerland were tested for susceptibility to nine antimicrobial agents. A clear decrease in resistance to macrolides, lincosamides, and tetracycline was visible after the ban. Vancomycin-resistant Enterococcus faecium belonged to the same clonal lineage as vancomycin-resistant isolates previously isolated from Danish pigs.
Boerlin
P
P
Institute for Veterinary Bacteriology, University of Bern, Bern, Switzerland. patrick.boerlin@unibe.ch
Wissing
A
A
Aarestrup
F M
FM
Frey
J
J
Nicolet
J
J
D000818:Animals; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000494:pharmacology*; D024881:Drug Resistance, Bacterial; D016983:Enterococcus / Q000187:drug effects*; D005243:Feces / Q000382:microbiology; D006020:Glycopeptides; D006133:Growth Substances / Q000008:administration & dosage; D007880:Legislation, Drug; D007886:Legislation, Veterinary; D008826:Microbial Sensitivity Tests; D013552:Swine / Q000254:growth & development / Q000382:microbiology; D013557:Switzerland; D015645:Tylosin / Q000008:administration & dosage; D020713:Vancomycin Resistance
D000900:Anti-Bacterial Agents; D006020:Glycopeptides; D006133:Growth Substances; C016249:avoparcin; D015645:Tylosin