Article
Effect of age and pregnancy status on adaptive immune responses of Canadian Holstein replacement heifers.
Journal of dairy science - 1 Feb 2011
Hine B C, Cartwright S L, Mallard B A
Abstract excerpt
Selection for production traits with little or no emphasis on health traits has led to an increase in the incidence of disease in Canadian dairy herds. We describe here a patented protocol for estimating the breeding value for immune responsiveness in heifers that combines measures of both cell-mediated (CM) and antibody-mediated (AM) immune responses (IR). The ability of putative type 1 and type 2 antigens used...
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