Figure 1.

A diagram presenting alterations in the mammary secretion, udder, or cow commonly used as signs indicative of bovine mastitis. Mild form—changes only in the mammary secretion (alterations in color, consistency, smell, and the presence of admixtures) being the result of inflammation of the ducts and/or alveoli within the gland. Moderate form—changes in the secretion and the udder (alterations in the color, consistency and temperature of the udder, and the presence of tenderness) resulting from the spread of inflammation to deeper structures of the mammary gland. Severe form—changes in the secretion, udder, and cow (presence of signs of generalized illness) resulting from the spread of infection and absorption of inflammatory products into the general circulation.