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Absorption of Colostrum Globulins Introduced Directly into the Duodenum

Departments of Dairy and of Animal Science, University of Arizona, Tuczon

ABSTRACT

It has long been recognized that there is intestinal absorption of immune globulins from the colostrum by the newborn calf for a limited time after birth. Mason et al. (4) suggested that the intestinal absorption of globulins by the newborn may be the incapacity for digestion, or that the gut of the newborn is more permeable at birth than later, or both.

Hill (2) suggested that the cessation of intestinal absorption of immune proteins from colostrum by the newborn of several species coincides with the development of gastric protein digestion. One explanation of this relationship is that after gastric digestion is initiated colostrum proteins are digested. Colostrum contains an antitryptic factor that normally may protect the proteins from pancreatic proteases (3). Deutsch and Smith (2) fed an aluminum-hydroxide gel and probanthine to a calf for 32 hr. postpartum, to inhibit gastric activity. A test globulin was fed at 40 hr., but there was no absorption of the globulin.