POPM 4230 Lecture Notes - Lecture 4: Somatic Cell Count, Bulk Tank, Mammary Gland
30 Nov 2016
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Document Summary
Mastitis 101 (cid:498)most costly disease for the dairy industry(cid:499) unless you work on lameness, reproduction different opinions. Bacteria, protozoa, algae almost always a mix. Practically, associated w. bacterial infection (not always) Typically, 1 cow in 5 has >= 1 case of clinical mastitis per lactation. Often most economically important disease on a dairy farm. #1 reason for use of abx in dairy cows = mastitis. Many mastitis causing organisms are common on the cow and in her environment. Bacteria have potential to enter mammary gland during & after every milking. Blood-milk barrier limits immune system components available to respond to challenge. Milk is a difficult place for immune cells and antibodies to function. Evidence that some cows are genetically programed for a (cid:494)better(cid:495) immune response. ~ great growth place for bacteria and not a lot of antibody activity. Mild = flakes, clots, or watery milk; normal quarter. Moderate = abnormal milk + swollen or hard quarter.
