PREVALENCE AND IN - VITRO ANTIBIOGRAM PATTERN OF DIFFERENT ANTIBIOTICS AGAINST MAJOR BOVINE MASTITIS PATHOGENS

Dairy milk samples from normal and mastitis cows were collected from Coimbatore district and subjected to bacterial isolation and antimicrobial susceptibility test by disc diffusion method. Staphylococcus aureuswas found to be the predominant isolate causing 61.11 % of clinical and subclinical mastitis cases, followed by coagulase negative Staphylococci .S.aureus shows high rate of beta lactamase activity and resistant to beta lactam antibiotics like Ampicillin, amoxicillin, Me Vancomycin and Cephotaxime. Gentamycin was found to be the most effective antibiotic in treating bovine mastitis cows.