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Factors affecting immunoglobulin concentration in colostrum of healthy Holstein Cows immediately after delivery.

Extract: 

This study analyzed the influence of the number of milkings, number of births, and udder quarter in immunoglobulin (Ig) concentration in the colostrum of healthy Holstein cows. It was collected two samples of colostrum by manual milking, getting the first jets to completion of bacteriological examination and immunoglobulin levels by radial immunodiffusion test in agar gel. Immunoglobulin concentrations in the colostrum of Holstein cows were influenced by the number of milking after delivery and the number of lactations. These variations may reduce the immunological quality of
colostrum, interfering with passive immunity transfer to newborn calves, either if they suck directly from the cow or if they are fed with stored colostrum from colostrum banks.

Source: 

Gomes V., Madureira K.M., Soriano S., Della Libera A.M.M.P., Blagitz M.G. & Benesi F.J. 2011.