522 Veterinary Medicine. 



and any internal disease must be attended to. For stocking, use 

 careful bandaging, hand-rubbing and exercise. 



With the formation of the deeper fissures the same antiseptic 

 agents may be employed, or salol, iodoform, glutol, aristol, or 

 some tincture of iodine, or iodide of starch may be used. A weak 

 solution of copper sulphate has often an excellent effect. The 

 measures advised below for grease will usually apply in this con- 

 dition. 



SEBORRHCEA OF THE DIGITAL, REGION : DIGITAL 

 IMPETIGO, GREASE: STREPTOCOCCIC DERMA- 

 TITIS IN HORSES. 



A sequel of erythema or cracked heels. Causes : constitutional predis- 

 position in lymphatic draught horses, rare in ass and mule, anatomical con- 

 ■ ditions, wet damp regions, digestive disorder, over- feeding and lack of 

 exercise, diseases of liver or kidney, change to stable life, cold water, slush, 

 mud, salted snow, steaming manure, urine in mares, infection, strepto- 

 coccus pyogenes. Symptoms : swelling, heat, and tenderness of pastern 

 hollow, itching, hairs erect, unctuous, exudate, vesicles, excoriations, dis- 

 charge opaque, grayish, sticky, fretid, chaps, knuckling, resting on toe, 

 kicking : in severe cases discharge" purulent, more opaque, sloughs, exces- 

 sive granulations, "grapes," extensions forward, upward, downward, 

 canker, quittor, sand crack, etc. Lesions: first, congestion of derma, hair 

 follicles full, hairs loose, connective tissue infiltrated, or thickened, liga- 

 ments and bones involved, grapes in superposed clusters pediculated. Diag- 

 nosis : from horse-pox. Treatment : remove causes, secure cleanliness, 

 laxative, diuretics, moderate grain ration, or tonic regimen ; locally, sooth- 

 ing antiphlogistic, antiseptic treatment, lead, zinc, phenol, creolin, lysol, 

 when advanced, antiseptic dusting powders, calomel, salicylic acid, iodine; 

 zinc oxide, salol, or solutions, zinc chloride, tar. Value of changes. For 

 "grapes" actual cautery, excision, ligature. 



This may develop as an advanced condition of the erythema or 

 cracked heels already described. Yet it is so distinctive in its 

 habit of profuse secretion, the eruption of vesicles or pustules and 

 the abundant, foetid sebaceous discharge that it deserves a special 

 consideration. 



Causes. Something depends on constitutional predisposition. 

 This is preeminently a disease of the heavy, lymphatic, draught 



