Relationship between California Mastitis Test reaction and production and composition of milk from opposite quarters

The relationship between the California Mastitis Test (CMT) reaction of milk from individual quarters and production was determined by comparing the production at a single milking, of opposite quarters of the same udder which differed in CMT reaction. These opposite-quarter comparisons were well distributed over the lactation period, season of year, and between front and rear halves of the udder. Test reactions of trace, 1, 2, and 3 were associated with average decreases in milk production of 9.0 percent, 19.5 percent, 31.8 percent, 43.4 percent per quarter per day, respectively. Test reactions were distributed as follows: negative, 36.7 percent; trace, 14.4 percent; 1, 27.8 percent; 2, 10.9 percent; and 3, 9.6 percent. Only 0.6 percent of the quarters were blind or dry at the time of examination. A comparison of the CMT reaction of foremilk and total quarter milk revealed that the two CMT readings were in agreement for 82.5 percent of the comparisons

Bibliographic Details

Main Authors:	68538 Forster, T.L., 44781 Ashworth, U.S., 88051 Lueduke, L.O.
Format:	biblioteca
Published:	1967
Subjects:	MASTITIS, SALUD ANIMAL, PRODUCCION DE LECHE, PERDIDAS,
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