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Class-specific activities of immunoglobulins [IgG, IgM, and secretory IgA (s-IgA)] recovered from the small intestine of beagle dogs after administration of bovine colostral antibody or serum antibody. Samples of fluid from the small intestine were collected at 1.5, 2, and 3 h after administration of antibody. Antibody activities are given in terms of absorbance, as measured by ELISA. The time 0 value represents the antibody activity before administration.
