Abstract
T. pyogenes are gram-positive, pleomorphic opportunistic, belonging to the group coryneform, which includes several micro-organisms of veterinary interest. Presents ubiquitous distribution, found in the skin microbiota, oropharynx and genital tract and gut of animals, as well as contaminating utensils. Mastitis in cows and heifers generally occurs in clinical form, lactation or the dry pe…