A farmer who works with sheep and goats presents with the lesion above. He notes fever, and exam shows regional lymphadenopathy. The lesion began as a red, solid, elevated papule then enlarged to the current state. Soon, it will form a red weeping surface, then develop a thin, dry crust with black dots covering the surface. After that, small papillomas will form. Finally, a thick crust grows over the lesion, the papillomas decrease in size, and the lesion flattens out.
Challenge: What's the cause of this disease?
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6 comments:
orf
Orf! We saw similar slides in our small ruminant medicine class.... :)
Orf disease...
orf virus infection
...i can't even begin to imagine how 4 people got orf....nice job :)
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Skin I
This is orf or milker’s nodule, a zoonosis from sheep, goats, and musk oxen, caused by a parapoxvirus.
Source: acponline.org.
@craig can't speak for the others but orf is no zebra for us veterinarians.
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