Cause.—Due to a vegetable parasite. It affects the hair and the outer layer of skin and is highly infectious, being transmitted from one animal to another.

Symptoms.—The disease usually appears in the form of circular patches of the skin, which soon become denuded of hair. Sometimes a white sticky discharge and the formation of scaly, brittle crusts on the patches appear, silvery gray in color. They are generally confined to the head and neck. It is a common disease among young cattle in the Winter and Spring. This disease is attended with more or less itching and is communicable to man.

Treatment.—Remove the scabs or crusts with soap and warm water. However, the surface of the body should be well dried after washing each time. Apply Tincture of Iodine with a camel-hair brush to the spots denuded of hair. It is quite necessary that the barn and rubbing posts be disinfected by spraying or washing them with a twenty-five per cent solution of Carbolic Acid.