ERYTHEMA CALORICUM : SOLAR ERYTHEMA. 



WHITE FACE AND FOOT DISEASE IN HORSES. 



England to Africa, on white skins, especially of face. Symptoms : local 

 congestion, swelling, itching, desquamation, during extreme heat : in worst 

 cases fever, dullness, inappetance, costiveness, diarrhoea, head constantly 

 moving, rubbing, vesicles, pustules, excoriations, cracks, fissures, septic 

 ulcers in nose and mouth, submaxillary and pharyngeal swellings, recovery 

 with dermal thickening and tenderness. Diagnosed from petechial fever 

 by the itching, and the absence of petechise. Prevention : breed solid dark 

 colors, avoid white skinned in hot climates or work in shade, away from 

 hot winds ; sunshade ; avoid friction and wetting in sunshine. Treatment : 

 shade, astringents, cool irrigation, vaseline, zinc ointment, lamp black, an- 

 tiseptics. Tie so as to prevent rubbing. 



This ha.s been observed in different latitudes from the coo 

 climate of Great Britain, to the burning suns of Africa, though 

 it reaches its highest intensity in the hotter regions. The parts 

 to suffer are those that are devoid of pigment, as the white star, 

 snip or blaze on the face, the white feet or legs, the white areas 

 in the piebald, and the whole surface in the albino. The white 

 face, however, suffers more than the white legs, apparently be- 

 cause of its more constant exposure, the absence of shadow from 

 the trunk, and the delicacy of the skin and fineness and thinne.ss 

 of the hair. 



SymptoDis. In slight cases there may be no constitutional 

 disorder, onh' redness, itching, swelling and subsequent des- 

 qtiamation of epidermis on the white portion of the skin, which 

 ma}' prove persistent so long as hot weather lasts and recover on 

 the advent of cold. 



The more violent cases seen in warmer climes, may belieralded 

 by febrile reaction, dullness, prostration, inappetance, constipa- 

 tion and .sometimes diarrhoea. The head may be kept in con- 

 stant movement, the itchy white parts being rubbed on any 

 object within reach, and the limbs are stretched, the front ones 

 forward and the hind backward, with a tendency to rub them 

 with the nose or foot. The skin at first red, becomes later 

 swollen, covered with vesicles which pass into pustules, burst 

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