Contagious pustular dermatitis -->
a specific disease of sheep and goats, caused by the orf virus. This virus is transmissible to man and characterised by vesiculation and ulceration of the infected site.
Synonym: contagious ecthyma, contagious pustular dermatitis, scabby mouth, soremouth.
Origin: O.E. Orfcwealm, murrain, fr. Orf, cattle, _ cwealm, destruction