Merck Manual

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Proliferative contagious ecthyma (orf), sheep
orf_proliferative_high
Proliferative contagious ecthyma (orf), sheep

    An ulcerative lesion of proliferative contagious ecthyma (orf), extending from the mucocutaneous junction of the lips in a sheep and covering both the lips and the nasal region.

Courtesy of Dr. Philip Scott.