[Comparative studies of total milk protein and protein fractions in various forms of bovine mastitis].

The content of total protein was assessed in 112 milk samples and of protein fractions--in 106 samples taken from cows suffering from clinical mastitis, subclinical mastitis, secretory disturbances, latent infection, and normal milk. Total protein increased along with the rise of cell content. It increased considerably also in the secretion of cows suffering from clinical mastitis, but the rise in the milk of cows with subclinical mastitis, secretory mastitis and laten infection was insignificant. In all mastitis forms the content of serum albumins and gamma-globulin rose significantly, while alpha-lactoalbumins and beta-lactoglobulin were reduced. These changes in the protein fractions of milk can be used with certainty in the diagnosis of all forms of mastitis.