SCABIES— MANGE— SCAB 287 



rupture and dry to form thin and later thick, gray scabs; 

 from rubbing the skin becomes swollen and creviced. 



Prognosis. — ^The prognosis is good if treated early. In 

 some cases the sheep is unable to eat. 



Treatment. — ^Treatment is the same as for sarcoptic mange 

 in the horse. 



Chorioptic (Symbiotic) Mange. — Chorioptic (symbiotic) 

 mange is very rare in sheep and appears around the fetlocks 

 and coronets, usually of the hind feet . Besides an eczematous 

 eruption there is pruritus, causing restlessness and stamping. 

 In rare instances the scrotimi or udder may be attacked. Heal- 

 ing usually occurs spontaneously when the sheep are turned 

 out on grass. 



Cattle Mange. — ^In the ox the principal mange is the 

 psoroptic. The favorite seats are the lateral surfaces and 

 crest of the neck, base of the horns, withers and root of the 

 tail. It rarely appears over the whole body. 



Symptoms. — ^The symptoms are those of pruritus and the 

 appearance on the skin of brownish-gray crusts and scabs, 

 the skin becoming thickened and welted. The hair falls out 

 over the infested regions. Excoriations of the skin may be 

 caused by the patient rubbing the part. If generalized the 

 patient becomes anemic, emaciated, cachectic and often dies 

 of inanition. The disease is worse in winter when the cattle 

 are stabled but improves in the spring when they are turned 

 out to graze. 



Treatment. — ^Treatment is the same as for horse mange, 

 avoiding, however, applications which contain merciuy. 



Chorioptic (Symbiotic) Mange. — This form occurs at the 

 tail root, on each side of the anus, and also on the legs. In 

 rare instances it may appear over the croup, loins, back, 

 side of the thigh and udder. It is characterized by pruritus, 

 scabs, squamse and loss of hair. It usually does not affect 

 the animal seriously but is worse during winter than in 

 smnmer. 



Treatment. — ^Treatment is the same as for psoroptic mange. 



Mange of Swine, — In swine the only mange is the sarcoptic. 

 This is not a common skin disease in America. The favorite 

 seats are about the head (eyes, cheeks, ears), although it 

 may extend from these parts to the neck, trunk, and limbs. 



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