The Collaborative International Dictionary of English v.0.48:

Mange \Mange\, n. [See Mangy.] (Vet.)
   The scab or itch in cattle, dogs, and other beasts.
   [1913 Webster]

   Mange insect (Zool.), any one of several species of small
      parasitic mites, which burrow in the skin of cattle.
      horses, dogs, and other animals, causing the mange. The
      mange insect of the horse (Psoroptes equi or
      Dermatodectes equi), and that of cattle (Symbiotes
      bovis or Dermatophagys bovis) are the most important
      species. See Acarina.
      [1913 Webster]

WordNet (r) 3.0 (2006):

mange
    n 1: a persistent and contagious disease of the skin causing
         inflammation and itching and loss of hair; affects domestic
         animals (and sometimes people)

Moby Thesaurus II by Grady Ward, 1.0:

43 Moby Thesaurus words for "mange":
   Texas fever, anthrax, aphthous fever, bighead, black quarter,
   blackleg, blackwater, blind staggers, bloody flux, broken wind,
   cattle plague, charbon, distemper, foot-and-mouth disease, gapes,
   glanders, heaves, hog cholera, hoof-and-mouth disease, hydrophobia,
   liver rot, loco, loco disease, locoism, mad staggers,
   malignant catarrh, malignant catarrhal fever, malignant pustule,
   megrims, milzbrand, paratuberculosis, pip, pseudotuberculosis,
   quarter evil, rabies, rinderpest, rot, scabies, sheep rot,
   splenic fever, staggers, stringhalt, swine dysentery