chorioptic mange

The common form of mange in cattle and horses caused by Chorioptes bovis. Cattle show small scabs on the perineum, tailhead and back of the udder without irritation. Horses show severe dermatitis behind the pastern with severe itching at first and then soreness. Sheep show a scaly dermatitis on the legs and on the scrotum of the ram, and may suffer from infertility. Called also leg mange, tail mange, symbiotic mange.