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Influence of feeding colostrum containing no, or inactivated bovine leukosis virus on the leukosis infection rate in calves



Influence of feeding colostrum containing no, or inactivated bovine leukosis virus on the leukosis infection rate in calves



Monatshefte fur Veterinarmedizin 40(20): 709-712



Experiments were conducted over 4 years on 1062 calves in two experimental groups and 775 calves in 3 groups of controls. Serum samples were tested for bovine oncovirus antibody at birth and on five occasions up to 30 months of age. About two-thirds of the dams were serologically positive for leukosis. The calves were separated from the cows at birth, and were given plain colostrum or colostrum acidified with citric acid. Some of the colostrum came from leukosis-free herds.

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