Abstract
Identify the causative agents of mastitis present in the mammary glands of primiparousheifers submitted or not to precalving treatment and to determine the in vitroantimicrobial susceptibility profile of the CoNS isolates. Eighty-seven animals werestudied: Farm (1), 40 heifers, commercial farm, all treated precalving; Farm (2), 18heifers; Farm (3), 29 animals. On Farms 2 and 3, the animal…