16 VETERINARY PARASITOLOGY 
confines its attacks to the legs and feet, chiefly to the 
pasterns and fetlocks, and up as far as the knee and 
hock. Its progress is very slow. The skin becomes 
denuded of hair, then thickened. Fissures appear and 
discharge, and the exudate runs into the cracks and 
dries into scabs. The entire skin over the part takes 
on a wrinkled leathery appearance, and, owing to 
irritation, serious sores may be produced from rubbing. 
The symptoms of violent skin irritation are shown by 
stamping the feet, jerking up the limbs, often in a manner 
simulating “ shivering,” and rubbing the part with the 
opposite foot. It may be mistaken for grease or the 
condition known as mud-fever, but the intense pruritus 
characteristic of symbiotic mange and the presence of 
the mite are sufficient to verify the diagnosis. 
Treatment of Mange in the Horse.—In psoroptic, and 
more particularly in sarcoptic, mange the horse should 
be scrubbed all over with warm soda-water, followed by 
a weak solution of any creolin preparation. This should 
be rinsed off with clean water, and the horse scraped 
down and allowed to become thoroughly dry. 
One should next proceed to dress one half of the body, 
supposing that the disease is well advanced, with a 
suitable parasiticide, such as the sulphur, tar, and alkali 
dressing, of which the prescription was given when re- 
ferring to the treatment of ringworm in calves. This 
should be left on for four days, when the horse should 
be washed again and the other half of the body treated 
in a similar manner. To complete the process, the 
horse must be thoroughly washed again with hot soda- 
water, and all the grease removed. 
The dressing should be applied with a brush, such as 
an old dandy, and thoroughly rubbed in, not simply 
smeared on. 
Among other dressings which may be used is the 
so-called Vienna liniment : 
