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Journal of Dairy Science Vol. 80 No. 10 2391-2397
© 1997 by American Dairy Science Association ®
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Effects of Infection by Caprine Arthritis-Encephalitis Virus on Milk Production of Goats

K. Nord 1 and T. Ådnøy 2

1 Norwegian College of Veterinary Medicine, Department of Large Animal Clinical Sciences, PO Box 8146 Dep., N 0033 Oslo, Norway
2 Agricultural University of Norway, Department of Animal Science, PO Box 5025, N 1432 Ås, Norway

The effects of caprine arthritis-encephalitis virus on lactational performance of goats were examined. The results of an ELISA for antibodies against caprine arthritis-encephalitis virus were compared with milk production records. Mean production of milk, protein, fat, and lactose and somatic cell counts were compared for seropositive and seronegative goats of similar ages. The results from 1799 lactating goats from 66 herds suggested that milk production was similar for 1-yr-old goats that tested seropositive and those that tested seronegative. For 900 of those goats for which data permitted comparison, milk fat and protein were also similar. A comparison of 331 goats showed that lactose contents did not differ between 1- and 2-yr-old goats, but somatic cell counts were higher in 2-yr-old seropositive goats.

Key Words: goats • caprine arthritis-encephalitis virus • milk production • somatic cell count

Submitted on August 21, 1996
Accepted on April 9, 1997




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J Dairy Sci, September 1, 2009; 92(9): 4355 - 4364.
[Abstract] [Full Text] [PDF]


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Copyright © 1997 by the American Dairy Science Association ®.