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Colostral Immunoglobulin Transfer in Calves. IV. Effect of Suckling¹

Department of Animal Sciences
and Center for Quantitative Studies, University of Arizona, Tucson 85721

ABSTRACT

The greater absorption of colostral immunoglobulin in neonate calves suckling their dams over bottle-feeding pooled colostrum was studied to determine if age (hours postpartum) at initial feeding, amount of colostrum ingested, or mothering effect of being with the dam were responsible. Rate of absorption and maximum absorption were superior in calves that suckled, regardless of age or amount of colostrum ingested. Though the mothering effect is questionable, there is evidence that something labile is being transferred to the calf in the fresh colostrum, acting as a messenger to stimulate rapid absorptive activity in the intestinal epithelium.

¹ Journal paper 2999 of the Arizona Agricultural Experiment Station.

² Department of Animal Sciences.

³ Center for Quantitative Studies.