5i8 Veterinary Medicine. 



the head, neck and thorax, which in 2 to 4 days form a large 

 central vesicle, with yellowish serous contents. Cases in the ox 

 (I/oiset, Seaman) had a similar eruption on the loins, quarters 

 and hind limbs, some of the swellings attaining the size of a hen's 

 egg, and with similar contents. l,ater these ruptured, crusted 

 over and healed, with, for a time, a smooth glistening surface. 

 Winkler records cases in swine and Schneidemiihl in dogs, but 

 the condition is rare in both animals. 



Treatment. To a nutritious, non stimulating and easily digest- 

 ible diet, may be added a course of arsenic and, in low condition, 

 of bitters. I,ocally dusting powders of zinc oxide, boric acid, 

 starch and lysol. Should the exudate form these into hard cakes, 

 they may be replaced by carbolized oil or, better, a 5 per cent, 

 mixture of ichthyol in vaseline. 



CRACKED HEEIvS IN HORSES. SCRATCHES. 



Special susceptibility and exposure of posterior pastern region. Di- 

 visions. Causes : local irritants, decomposing manure, chill water, slush, 

 mud, pools of liquid manure, septic irritation, stones, sand, lime in mud, 

 salted snow or ice, washing heels, caustic soaps, stubble, clipped or singed 

 hair, stocking of limbs, lymphangitis, sprains, arthritis, anaemia, cardiac, 

 urinary or hepatic disease, parasites, heavy bedding, constitutional predis- 

 position. Symptoms : redness, heat, tenderness, swollen, erect hairs, lame- 

 ness, knuckling, or exudate, crusts, scabs, abrasions, chaps, fissures, ulcers, 

 loss of pliancy, engorgment of limbs, foetid secretion. Prognosis accord- 

 ing to cause. Treatment: remove causes, give rest, cleanse limb and 

 stable, astringent antiseptic lotions, sulphurous acid, carbolic acid, cre- 

 olin, lysol, pyoktanin, chrysophanic acid, moderate laxative food, diuretics, 

 arsenic, bandaging, hand rubbing, exercise. 



The affections of the heel or posterior part of the pastern in 

 horses are largely modified by the anatomical character of the 

 skin in this region, and the special exposure to inimical agents, 

 so that it is convenient to consider them under special headings, 

 even though the eruption may be of the same kind with that seen 

 in other parts. The dermatites of this region, which are not 

 primarily contagious may be conveniently divided into ist, such 

 as are unattended with free secretion, and 2d, those that implicate 

 the sebaceous glands and are marked by an offensive discharge. 

 Cracked heels belong to the former category. 



