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Measurement of IgG, IgA and IgM in bovine colostrum by nephelometry and radial inmunodiffusion, with reference to the influence of season, number of lactations and genetic factors


, : Measurement of IgG, IgA and IgM in bovine colostrum by nephelometry and radial inmunodiffusion, with reference to the influence of season, number of lactations and genetic factors. Deutsche Tierarztliche Wochenschrift 89(3): 107-110

The immunoglobulins IgG and IgA were measured in 162 samples of colostrum, and IgM in 19 samples, by nephelometry. IgM was also estimated in another 52 samples by single radial immunodiffusion. Mean values in g per litre were 54 for IgG, 9.5 for IgA and 4.8 for IgM. With successive lactations IgG increased up to the fourth, and IgA up to the fifth lactation. The proportion of whey protein also increased up to the fourth lactation.

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