504 



DISEASES OF THE SKIN. 



prevent the patients from licking themselves, as I have thought 

 that while the ingestion of the iodine usually made them sick, it 

 never had any serious consequences, but appeared rather to hasten 

 the cure. Every part of the body should be anointed whether it 

 be diseased or not, and it is a rare condition that will require a 

 second application. I have obtained such good results from this 

 treatment in eczema that I am almost tempted to look upon it as a 

 specific for this condition. — w. l. z.] 



B. Eczematous Diseases of the Horse. 



Most of the non-parasitic cutaneous diseases of the horse are of 

 a purely eczematous nature. Various dermatoses described a& 

 special eruptions must be classified with eczema, and we may with- 

 out any inconvenience suppress the names applied to some of these. 

 We connect with eczema the following eruptions, which have been 

 considered as so many independent diseases : 



1. Lichen and strophulus, summer mange, saddle mange, heat 

 pimples, pimply and tuberculous eruptions — which are but varieties 

 of papulo-vesicular eczema. 



2. Pityriasis and psoriasis — the characteristics of which are those 

 of squamous or chronic eczema. 



3. ^' Mange^^ of mane and tail, diseases designated under the 

 name of " rat taiV^ — may be classified with pustular impetiginous^ 

 and chronic eczemas. 



4. Pastern crevices (scratches), salanders and malanders — which 

 represent a local eczema, at first moist and later impetiginous. 



1. Papulo-vesiculous Eczema {Lichen, Strophulus, Heat Pimples,, 

 Summer Eruption, Summer Mange, Saddle Mange). 



Etiology. Papulo-vesiculous eczema of the horse is usually 

 limited to certain regions ; it may, however, invade the whole 

 surface of the body (during the course of strangles — for instance, 

 where it is developed parallel with urticaria, and during the sum- 

 mer, when it appears in the shape of heat pimples or summer mange). 

 The regions which are mostly affected are those where the sudation 

 is abundant or which are exposed to mechanical irritations : head 

 (halter), the lateral sides of the base of the neck and shoulders, the 

 neighborhood of the withers (collar), the back and costal regions 



