Mange simply means an infection of the skin with mites, which usually implies loss of hair and scaly or scabby skin.
Sarcoptic mange is the most common type of mange in dogs. It is a skin disease caused by host-specific strains of the burrowing mite Sarcoptes scabei.
Demodectic mange is a skin disease caused when a mite called Demodex, which usually is relatively harmless, proliferates and overpopulates the skin of its host animal.
Cheyletiella mites are distributed worldwide, and their distribution in the United States tends to be geographically concentrated in pockets.
Notoedric mange is a skin disease caused by a burrowing mite and is the feline version of scabies. The mite, Notoedres cati, occurs worldwide and is endemic in some parts of the US, particularly along the Gulf Coast.