Parasitic Skin Diseases

This chapter highlights clinical features, differentials, and diagnostic information for parasitic skin diseases of bovine. Those diseases are chorioptic mange, psoroptic mange, sarcoptic mange, demodectic mange, pediculosis stephanofilariasis, miscellaneous parasitic diseases, psorergatic mange, trombiculidiasis dermanyssus, gallinae dermatitis, raillietia auris infestation, and ticks gotch ear fleas. Chorioptic mange is common and cosmopolitan. Sarcoptic mange is caused by the mite Sarcoptes scabiei var bovis. There are no apparent breed, age, or sex predilections. Transmission occurs by direct and indirect contact. Demodectic mange is an uncommon, cosmopolitan dermatosis caused by the mite Demodex bovis. Demodectic mange is an uncommon, cosmopolitan dermatosis caused by the mite Demodex bovis. Stephanofilariasis is a nonseasonal disease, although it is often worse in warm weather, presumably the result of the activity of fly intermediate hosts. In North America—especially in the west and southwest—stephanofilariasis is caused by Stephanofilaria stilesi.