Mastitis is one of the most significant diseases of dairy cattle.
Mastitis is an infectious disease condition resulting in an inflammatory reaction in the mammary gland of the cow. It is the most common disease in dairy cattle characterized by various degrees of severity - ranging from a mild disease with no gross changes in the secretion (milk) but an increase in inflammatory cells (somatic cells) in the milk, to a moderate disease with an increase in inflammatory cells and gross changes in the milk. It may be accompanied by signs of inflammation in the mammary gland including swelling, redness, and painfulness. Mastitis may progress to a severe disease with all of the above changes in the milk and systemic signs including fever, depression, and “off-feed” and occasionally even death in the most severe cases. Mastitis reduces milk production and milk quality.