Abstract
The effects of age and dietary change on the structure and function of piglet small intestine were investigated in gnotobiotic pigs. The small intestinal mucosa was damaged when gnotobiotic pigs were weaned on to a pelleted meal diet; villus height, crypt cell production rate, and activities of brush border enzymes were reduced. Small intestinal damage was associated with reduced weight gain over a three week period; diarrhoea was not observed. The continuous consumption of meal appeared to perpetuate the intestinal damage for three weeks, although evidence of intestinal repair, as indicated by an increased crypt cell production rate, was present three weeks after weaning. Antibodies to soya antigen were detected in serum after weaning and the intestinal damage could have been caused by antibody-mediated immune reactions to soya proteins. Villi of milk fed gnotobiotic pigs shortened significantly with age.
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