Ulcerative and papillomatous digital dermatitis of the pastern region in dairy cattle: clinical and histopathological studies. |
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| Authors: | W el-Ghoul B I Shaheed |
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| Institution: | Department of Surgery, Anaesthesiology and Radiology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt. |
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| Abstract: | The study was carried out on a single herd of 500 Holstein breed dairy cattle. Only 50 dairy cows (10%) were found to be suffering from focal ulcerative and papillomatous digital dermatitis of the pastern region. The cows were subjected to clinical and histopathological examinations. Early ulcerative stage was seen in 30 cows and late papillomatous stage was observed in 20 cows. The topical application of oxytetracycline solution or benzathine penicillin powder appeared to be effective for the treatment of the ulcerative lesions. The histopathological findings showed signs of epidermopoiesis and papilloma formation. The dermal reaction revealed signs of fibroplasia and perivascular aggregation of inflammatory cells. Silver stained sections indicated the presence of longer filamentous spiral spirochetes, cocci and large-sized anaerobic bacilli invading the stratum spinosum. In conclusion it can be said that bovine digital dermatitis was observed in ulcerative and papillomatous form at the pastern region bordering the dewclaws. Spirochetes are frequently associated with and may be responsible for pathological changes in the lesion. |
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