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. 2001 Nov;39(11):4193-5.
doi: 10.1128/JCM.39.11.4193-4195.2001.

Antimicrobial growth promoter ban and resistance to macrolides and vancomycin in enterococci from pigs

P Boerlin  1 , A Wissing, F M Aarestrup, J Frey, J Nicolet
Affiliations

Antimicrobial growth promoter ban and resistance to macrolides and vancomycin in enterococci from pigs

P Boerlin et al. J Clin Microbiol. 2001 Nov.

Abstract

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.

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Figures

FIG. 1
FIG. 1
SmaI restriction profiles of vancomycin-resistant and -susceptible E. faecium isolates. (A) M, molecular weight marker. Lanes 1 to 4, vancomycin-resistant isolates from Switzerland; lanes 5 to 9, vancomycin-susceptible isolates. The isolates in lanes 2 to 5 came from the same farm, and those in lanes 6 to 9 came from four epidemiologically unrelated farms. (B) M, molecular weight marker. Lanes 1 and 2, same isolates as in panel A; lanes 3 to 6, representative vancomycin-resistant isolates from Danish pigs. Note that the Swiss isolate in lane 2 differs in only one to five bands from the Danish isolates.
See this image and copyright information in PMC

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