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Escherichia coli Producing CMY-2 β-Lactamase in Bovine Mastitis Milk

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An Escherichia coli isolate producing the CMY-2 β-lactamase was found in the milk of a cow with recurrent subclinical mastitis. The isolate was resistant to the antibiotics commonly used for intramammary mastitis treatment, such as penicillins, cephalosporins, β-lactam/β-lactamase inhibitor combinations, aminoglycosides, tetracyclines, and sulfonamides. This is the first report of a plasmid-mediated AmpC-producing Enterobacteriaceae in bovine milk.

Document Type: Research Article


Affiliations: 1: Institute of Veterinary Bacteriology, University of Bern, Bern, Switzerland 2: Institute of Veterinary Bacteriology, University of Bern, Bern, Switzerland.

Publication date: 2012-01-01

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