Abstract
A case of swine hyostrongylosis was parasitologically and pathologically studied. The fundic region of the stomach harboring Hyostrongylus rubidus included the following changes; hyperemia, cell infiltration and granuloma formation in the lamina propria as well as hyperplasia of lining epithelium on the surface of the mucosa. Proliferation of the epithelial lining of the mucous layer was also observed in the pyloric region of the stomach infected with H. rubidus. The present case may be regarded as a mild infection, since neither ulceration nor hemorrhage was noted in the gastric mucosa of the fundic region.
