Tinea Tonsurans. Circinate Ringworm. 21 



scurf and the exudation of serum and even of blood, which con- 

 cretes in scabs or mats the adjacent hairs. The spots may unite 

 to form extensive and irregular patches, which, prove more pruri- 

 ent than in the horse and much more inveterate. The depilated 

 spots remain scurfy or clear and glistening for a length of time, 

 and with marked discoloration and whiteness. Irritation and 

 swelling, too, may last for a considerable time. 



Cat. In the cat the face and paws especially suffer, the dis- 

 ease being often contracted from the mice caught, yet it may ex- 

 tend to any part of the body. It begins with a .scurfy centre with 

 hairs erect, which gradually extends, with falling of the hairs and 

 the formation of a bare spot ^ to i inch in diameter. 



Sheep. The disease prefers the back, head or neck, but may 

 appear on any part of the body. On hairy parts the course is like 

 as in cattle ; on the wooly there is manife,st flattening of one or 

 more tufts of wool, which become matted, and when separated 

 shows a dense .scurfy accumulation around its roots. By and by 

 the wool is shed, and may hang in white tufts among the 

 healthy. The itching is much greater than in cattle and horses, 

 yet incomparably less than in acariasis. 



Goat. The affection follows the general course, but is com- 

 paratively little irritating or persistent. 



Pig. Siedamgrotzky describes the scurfy patches as 2 to 5 cm. 

 in diameter, irregular in form, reddened and covered with scaly 

 eruption. The bristles drop off and the centre of the patch be- 

 comes hard and dry, while the periphery remains slightly moist, 

 red and scaly. Adjacent spots are liable to run together until a 

 large part of the face or ears is involved. 



Birds. Friedberger and Frohner describe the disease in birds 

 as causing marked hypersemia of the skin and dropping of the 

 feathers. 



Trichophyton Epilans. Depilating Trichophyton. Meg- 

 nin found in the horse a cryptogam which grew more freely in 

 the stem, bulb and follicle of the hairs, and led to the evulsion of 

 the hairs much more rapidly than with the trichophyton tonsu- 

 rans in the honse. It grows also, as a rule, with greater rapidity, 

 and in artificial cultures it forms at first a yellow pellicle and rap- 

 idly liquefies gelatine, whereas the tinea tonsurans forms abun- 

 dant snow white tufts and liquefies gelatine very slowly (Duclaux). 



