MANGE. 



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were treated with an application of carbolated alcohol and frequent 

 washings with sublimate solutions at 2 per cent. In this way a 

 final cure was obtained. 



A horse affected by a quite extensive mange was cured, in a 

 relatively short time, by twelve washings of sublimate solution and 

 by frictions with Vienna tar liniment, carbolated alcohol, and bal- 

 sam of Peru. 



These few facts are sufficient to show how tenacious sarcoptic 

 mange is, and how rebellious to all treatment. 



2. PsoROPTic MANGE. This form of mange starts with some- 

 what large spots which are distinctly circumscribed, and are prefer- 

 ably located upon protected regiotis, especially at the base of the 

 mane, tail, sheath, upon the mammae and the inner surface of the 

 posterior members ; they are more rarely found upon the withers, 

 back, or croup. The first manifestation is the appearance of pim- 

 ples, of papiilous islands produced by the bites of the psoroptes ; 

 a lymphoid liquid oozes from these lesions which dries up and 

 forms scabs, which may become as thick as a finger. In addition 

 we observe an abundant epidermic desquamation and falling out of 

 the hair. The skin becomes gradually thicker, acquiring the aspect 

 and consistence of leather; it is also wrinkled. The pruritus is 

 intense ; the integument becomes excoriated, bloody, or suppurating, 

 and is inflamed in its whole thickness by the action of rubbing. 



The differential diagnosis of psoroptic and sarcoptic mange is 

 based upon the predilection of the former for protected regions, and 

 on the characters of the parasite. In addition, psoroptic mange 

 progresses in the same way as an oil-spot on a piece of cloth ; when, 

 however, it has invaded a large surface, it may simulate and be 

 mistaken for sarcoptic mange. The intense pruritus which accom- 

 panies it, and the distinct definition of the blotches at the beginning 

 of the affection, permit us to distinguish it easily from squamous 

 eczema and from mange of the mane. 



A cure is much more rapidly obtained than in sarcoptic mange. 

 We succeed quickly, even with drugs of little energy. Cresolated 

 or carbolated soap, or glycerin associated with these agents (10 

 parts to 1), used alone or with Vienna tar liniment, are anti- 

 psorics which suffice in all cases ; the latter must not be used when 

 thick crusts are present. In cases of some gravity, the medium 

 duration of the treatment varies from two to three weeks. 



3. Symbiotic mange. This is also known under the name of 



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