Tetracycline resistance determinants, Tet B and Tet M, detected in Pasteurella haemolytica and Pasteurella multocida from bovine herds

Abstract
Resistance to antibiotics has recently emerged in Pasteurella haemolytica and Pasteurella multocida isolated from bovine herds. Forty-two clinical strains resistant to antibiotics and isolated through a French national network from different origins were analysed for their resistance to tetracycline. The MICs of tetracycline ranged from 32–256 mg/L. The resistance determinants Tet B and Tet M were detected in two strains, in which they are probably chromosomal.

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