Ulcerative diseases of animals with an infectious etiology.

The oral lesions of five viral diseases of cattle are compared. Two of the diseases, foot-and-mouth disease and vesicular stomatitis, cause vesicles, and rinderpest, bovine virus diarrhea and malignant catarrhal fever produce sharply demarcated erosive lesions. Gross lesions of different diseases appear similar: however, histologically, there are subtle differences in the development of the lesions.