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Antimicrobial Agents and Chemotherapy, August 2004, p. 3179-3181, Vol. 48, No. 8
0066-4804/04/$08.00+0     DOI: 10.1128/AAC.48.8.3179-3181.2004

Extended-Spectrum-Cephalosporin Resistance in Salmonella enterica Isolates of Animal Origin

Antimicrobial Resistance Research Unit, Russell Research Center, Agricultural Research Service, U.S. Department of Agriculture, Athens, Georgia 30604-5677,¹ Center for Veterinary Medicine, Food and Drug Administration, Rockville, Maryland 20857,² Center for Veterinary Medicine, Food and Drug Administration, Athens, Georgia 30605³

Received 24 October 2003/ Returned for modification 24 January 2004/ Accepted 27 April 2004

A total of 112 out of 5,709 Salmonella enterica isolates from domestic animal species exhibited decreased susceptibilities to ceftiofur and ceftriaxone, and each possessed the bla_CMY gene. Ten Salmonella serotypes were significantly more likely to include resistant isolates. Isolates from turkeys, horses, cats, and dogs were significantly more likely to include resistant isolates.

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