2^2 Diseases of the Skin. 



violent, and dangerous, when touched, or the harness is 

 laid upon them. The attacks usually end gradually, but 

 they are quickly developed when approached by human 

 beings or animals of the same species. Access to the 

 male often effectually reduces the excitement, which, 

 however, returns at the first period of oestrum after the 

 foal is born. Some affected animals will not breed, are 

 nothing less than a common nuisance, and always a 

 source of danger. Subcutaneous Injections, No. 3. 



CHAPTER XXIV. 

 DISEASES OF THE SKIN. 



Erythema— Erysipelas— Nettle-rash— Prurigo— Eczema, Simple and Chronic 

 — Mallanders and Sallanders— Herpes Pblyctenoides — Herpes Circinatus 

 — Impetigo — Pustular Erysipelas, or Grease — Boils, or Carbuncles — 



Sitfasts. 



Erythema, or Exanthema, is an acute form of inflam- 

 mation of the skin — corium, the result of local irritation. 

 The attendant redness is seen to advantage only in white 

 animals, and those having thin skin. Pressure dissipates 

 the colour, which returns when the skin is relieved. 

 Swelling may be detected by passing the flat hand over 

 from the healthy to the diseased surfaces ; the hair on 

 the latter becomes erect, a gelatinous fluid exudes, small 

 vesicles form, the hair is matted, and if the disease con- 

 tinues the discharge becomes purulent, and is succeeded 

 by ulceration with sloughing, when the states are aggra- 

 vated. Recovery is denoted by drying, peeling of scales, 

 the skin beneath gradually assuming the original condi- 

 tion. The causes are chafing or friction by harness, or 

 one part of the skin upon another, as seen in obese 

 animals ; blows, when the swelling takes the form of 

 weals resembling the instrument by which they were in- 

 flicted ; wounds in clipping ; discharges flowing from 



