Department of Veterinary Pathology, Ranchi Veterinary College, Birsa Agricultural University, Kanke, Ranchi-834006
*Corresponding author: Present address: Department of Pathology, Orissa Veterinary College, OUAT, Bhubaneswar-751003, Orissa, E-mail- drrajraj@gmail.com,
The study was conducted on 190 milk samples of bovine mastitis and 138 samples were found positive for microorganisms. Staphylococcus aureus (27.37%) was found to be the most prevalent organism followed by coagulase negative Staphylococcus spp. (12.63%), E. coli (08.95%), Pseudomonas spp. (07.89%), Streptococcus spp. (05.79%), yeast (03.15%), Klebsiella spp. (01.57%) and Bacillus spp. (00.52%). Further, routine parameters viz. consistency, pH, cell population, cytology, lipid vacuolation, clumping of cells and reticulin estimation and their correlation with causative agents was studied. A high level of mononuclear cell infiltration was observed in staphylococcal, yeast and pseudomonal mastitis suggesting that these infections could more frequently lead to chronic mastitis. Lipid vacuolation was found with increased frequency in staphylococcal mastitis followed by that of E. coli and Pseudomonas spp. Number of reticulin positive milk samples was found to be highest in yeast mastitis followed by streptococcal mastitis indicating the possibility of high incidence of udder fibrosis in these infections. The study suggested that comprehensive examination of milk and antibiotic sensitivity testing could provide valuable information with respect to nature of disease, and selection of drug regimen for the prevention and treatment of mastitis.
Bovine mastitis, Diagnosis, Lipid solubility, Reticulin, Treatment
