Abstract

Gastric biopsies from the fundic gland region of 122 dogs and 127 cats were subjected to histopathological examination. The aim of the study was to determine infection rates and degrees of colonization by Helicobacter-like organisms (HLOs), and to ascertain their possible relationship to histopathological changes. In all, 82% of the dogs and 76% of the cats had an HLO infection. The most striking histopathological changes were glandular degeneration with accumulation of lymphocytes and neutrophilic granulocytes (dogs, 21%; cats, 39%), fibrosis of the lamina propria mucosae (dogs, 41%; cats, 58%), oedema in the lamina propria mucosae (dogs, 54%; cats, 23%), lymphoid follicles (dogs, 17%; cats, 19%) and lymphoplasmacytic infiltrates. A relation between the degree of colonization by HLOs and the extent of histopathological changes could only be discovered in the cats. It was not possible to ascertain whether these bacteria, irrespective of the degree of colonization, were responsible for the histopathological changes in the dogs.

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