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  • Title: Escherichia coli agglutinins in cow serum, colostrum and the nursing calf.
    Author: Jacks TM, Glantz PJ.
    Journal: Can J Comp Med; 1970 Jul; 34(3):213-7. PubMed ID: 4248443.
    Abstract:
    Immunochemical properties of Escherichia coli O antibodies present in bovine serum and colostrum were investigated. Dam and calf serum samples plus colostral whey samples were fractionated by gel filtration, and the 7S and 19S fractions isolated. Antibody activity against the O antigens of four recognized E. coli bovine pathogens was determined by the indirect hemagglutination test on the whole serum and colostral whey samples and the 7S and 19S fractions thereof. Mercaptoethanol reduction was used to chemically study the immunochemistry of the E. coli O antibodies. The E. coli O antibodies in dam serum were entirely 19S macroglobulins and appeared to be IgM immunoglobulins. The antibodies in colostrum and calf serum were both 7S and 19S globulins. Reasons for believing these 7S antibodies may be IgG, and the 19S antibodies IgA, immunoglobulins are presented.
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