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Relationship of Pelleted, Autoclaved and Heat-Expanded Corn or Starvation to Gastric Ulcers in Swine^{1, 2,}

University of Guelph, Guelph, Ontario

Abstract

The relationship of feeding pelleted, autoclaved and heat-expanded corn or starvation to the development of gastric ulcers in swine was studied. Lesions in the esophageal area of the stomachs of pigs were produced by feeding reground pelleted corn and by starvation. However, the frequency and severity of the lesions were similar on diets containing raw, autoclaved or heat-expanded corn. The lesions observed in the stomachs of the experimental pigs resembled, macroscopically and microscopically, naturally occurring lesions observed in the field. Pigs with stomach lesions had stomach contents which were more fluid than pigs with normal stomachs. The pH of the stomach contents of pigs at the time of slaughter could not be correlated with the presence of lesions.

The significant increase in the number of abnormal stomachs in the pigs which had been starved indicated that the lesions could develop in 72 hr. Since no food was present in the stomachs of pigs which had been starved, it is possible that the gastric juice may have been one of the principal causes of the development of gastric lesions.

¹ This research was supported in part by the Ontario Department of Agriculture and Food, and by a grant from Connaught Medical Laboratories.

² The authors are indebted to Dr. G. Ashton for assistance in performing the statistical analyses.

³ Department of Clinical Studies, Ontario Veterinary College.

⁴ Department of Nutrition, Ontario Agricultural College.