MANGE

Mange (demodicosis) is an inflammatory disease in dogs caused by various types of the Demodex mite. When the number of mites inhabiting the hair follicles and skin of the dog become exorbitant, it can lead to skin lesions, genetic disorders, problems with the immune system and hair loss (alopecia). The severity of symptoms depends upon the type of mite inhabiting the dog.


CAUSES
While an exact cause of mange in dogs is unknown, many experts believe genetic factors, such as problems with the immune system, may predispose a dog to developing mange.
Three species of mites have been identified to cause mange in dogs. While the mode of transmission is unknown for two of these, it is known that one type, Demodex canis, inhabits the skin and hair follicles and may transfer from mother to newborn during nursing.

TREATMENT
If localized, the problem is likely to resolve itself and disappear spontaneously, which happens in approximately 90 percent of cases. For severe generalized cases, long-term medication may be necessary to control the condition. Lime-sulfur dips to the affected areas may help relieve symptoms. In either case, the general health status of the animal should be evaluated.

Ref: petmed.com