ABSTRACT
Mastitis, inflammation of the mammary gland, is one of the main diseases of milk cattle, having as the main infectious agent the Staphylococcus spp. bacteria, which commonly presents resistance to the antibiotics used in the treatment of mastitis. For this reason, this study was aimed at drawing the profile of anti-microbial sensibility of 59 strains of coagulase-positive staphylococcus, isolated from samples of cow milk with mastitis. The tests of anti-microbial sensibility were accomplished through a diffusion technique with disks for 13 antibiotics, it being verified that the most effective were vancomycin with 100% of susceptibility and norfloxacin with 96%. The least effective was penicillin with 20% of susceptibility. In some of the studied coutries the staphylococcus strains presented multiple resistance to from 6 to 9 antibiotics simultaneously. The conclusion is that the analysis of the anti-microbial susceptibility in vitro should be considered by the proprietors before taking decisions about the choice of the appropriate treatment in order to reduce losses in the production of milk and in control programs of the disease in question.
KEY WORDS
Staphylococcus spp.; antimicrobial susceptibility; bovine; mastitis
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