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  • Title: Factors affecting the transfer of immunoglobulin G1 into the milk of Holstein cows.
    Author: Liu GL, Wang JQ, Bu DP, Cheng JB, Zhang CG, Wei HY, Zhou LY, Zhou ZF, Hu H, Dong XL.
    Journal: Vet J; 2009 Oct; 182(1):79-85. PubMed ID: 18602849.
    Abstract:
    Immunoglobulin (Ig) G1 concentrations in milk from Holstein cows was measured to determine if transfer and concentration was influenced by production factors (lactation number, stage of lactation, daily milk production), milk composition (milk fat, protein, lactose, and total solids content) or by serum IgG1 concentration. Two hundred and ninety-nine Chinese Holstein cows were randomly selected from four herds containing a total of more than 1600 lactating animals. The concentration of IgG1 in the milk and serum was determined by ELISA. Milk IgG1 concentrations varied between 0.030 and 0.614 mg/mL and significantly correlated with lactation number, stage of lactation, daily milk production and somatic cell count. The IgG1 mass was found to highly correlate with lactation number, stage of lactation, daily milk production and milk protein content. Lactation number had the highest positive direct relationship with IgG1 concentration.
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