20 Veterinary Medicine. 



yet after a time, a new colonization may take place on such bare 

 spot and the same method of extension may be repeated. 



Cattle. In calves, yearlings and adult cattle the head and 

 neck are most frequently attacked, the eyelids, ears, and in calves 

 the lips being the favorite seats. It often shows in button-like, 

 crusty elevations, the thickest on the darkest skins (Gerlach), 

 which may extend to one or two inches or more, shedding their 

 hairs and finally the central scurf. If the scurf is rubbed off, the 

 base is found to be. swollen, red and angry, may bleed readily, 

 and may exceptionally show small vesicles, or suppuration. 

 Some itching may be present, but is not usually very marked. 

 Several are usually affected in the same herd and ringworm may 

 often be found in one or more of the attendants. 



Horse. In solipeds the affection is especially seen on the up- 

 per parts of the body (shoulders, back, loins, croup, flanks), 

 where the skin and hair are thicker, affording a better shelter for 

 the spores, and where the spores are liable to be deposited by 

 comb, brush, rubber or harness. They are rarely found on the 

 lower parts of the limbs, yet Cousin found the shanks of a Guade- 

 loupe mule entirely denuded of hair through ringworm. On a 

 well-groomed horse the first indication may be the formation of 

 an erect tuft of hairs upon a raised scurfy base, which rapidly ex- 

 tends with the accompaniment of depilation, and the exposure of 

 scurfy or bare circular patches of the diameter of a quarter of a 

 dollar or more. In many cases the hairs have merely broken 

 across by the skin and can .still be felt projecting from the bare 

 surface. The surface is at first moist, but tends to become of a 

 slaty gray thickened, glabrous aspect. The circularity of the 

 bare .spots is characteristic, and even after new hair has started 

 these give a dappled appearance because of the darker hue of the 

 new and as yet unbleached hairs. When the new hair starts in 

 the center, with the disease advancing all around so as to form a 

 bare ring, it is still more suggestive. The itching is, as a rule, 

 very .slight, and rarely leads to irritating rubbing. 



Dog. The dog is usually attacked on the head, eyelids, lips, 

 legs and feet, but the spots may be found on any part of the 

 body. The scurfy concretion and erection of a tuft of hair may 

 be detected early, but usually the first symptom observed is the 

 dropping of a tuft of hair, the accumulation of a white or grayish 



