Formulation of Colostrum Supplements, Colostrum Replacers and Acquisition of Passive Immunity in Neonatal Calves

摘要

Provision of an adequate mass of IgG from maternal colostrum is essential to health and survival of neonatal calves. Colostrum supplements (CS) have been devel - oped to provide supplemental immunoglobulin when maternal colostrum is of poor quality. However, colos - trum replacers (CR) that provide ≥ 100 g of IgG have not been formulated. Our objective was to determine the absorption of IgG in newborn calves fed CS derived from bovine serum or CR derived from bovine immuno - globulin concentrate.