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High-level aminoglycoside resistant enterococci isolated from swine

Published online by Cambridge University Press:  09 December 2004

C. R. JACKSON ,
P. J. FEDORKA-CRAY ,
J. B. BARRETT  and
S. R. LADELY
C. R. JACKSON
Affiliation:
Antimicrobial Resistance Research Unit, USDA-ARS, Russell Research Center, Athens, GA 30605, USA
P. J. FEDORKA-CRAY
Affiliation:
Antimicrobial Resistance Research Unit, USDA-ARS, Russell Research Center, Athens, GA 30605, USA
J. B. BARRETT
Affiliation:
Antimicrobial Resistance Research Unit, USDA-ARS, Russell Research Center, Athens, GA 30605, USA
S. R. LADELY
Affiliation:
Antimicrobial Resistance Research Unit, USDA-ARS, Russell Research Center, Athens, GA 30605, USA
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Abstract

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Approximately 42% (187/444) of swine enterococci collected between the years 1999 and 2000 exhibited high-level resistance to gentamicin (MIC [ges ]500 μg/ml), kanamycin (MIC [ges ]500 μg/ml), or streptomycin (MIC [ges ]1000 μg/ml). Eight aminoglycoside resistance genes were detected using PCR, most frequently ant(6)-Ia and aac(6′)-Ii from Enterococcus faecium. Twenty-four per cent (45/187) of total high-level aminoglycoside-resistant isolates and 26% (4/15) of isolates resistant to high levels of all three antimicrobials were negative for all genes tested. These data suggest that enterococci isolated from swine contain diverse and possibly unidentified aminoglycoside resistance genes.

Type
Short Reports
Information
Epidemiology & Infection , Volume 133 , Issue 2 , April 2005 , pp. 367 - 371
Copyright
© 2004 Cambridge University Press

Footnotes

This work was presented in part at the 2002 International Conference of Emerging Infectious Diseases, Atlanta, GA, USA, 24–27 March 2002.