478 DISEASES OF THE HORSE. 
tincture of iodin twice a day for two weeks. Germs about the stable 
may be covered up or destroyed by a whitewash of freshly burned 
quicklime, the harness, brushes, etc., may be washed with caustic 
soda, and then smeared with a solution of corrosive sublimate one- 
half dram and water 1 pint. The clothing may be boiled and dried. 
Parasite: Achorion schénleini. Mavapy: Favus, or honeycomb 
ringworm.—Mégnin and Goyau, who describe this in the horse, say 
that it loses its characteristic honeycomb or cup-shaped appearance, 
and forms only a series of closely aggregated, dry, yellowish crusts 
the size of hemp seed on the trunk, shoulders, flanks, or thighs. 
They are accompanied by severe itching, especially at night. The 
cryptogam, formed of spherical cells with a few filaments only, 
grows in the hair follicles and on the cuticle, and thus a crust often 
forms around the root of a hair. Like the other cryptogams, their 
color, as seen under the microscope, is unaffected by acetic acid, 
alcohol, ether, or oil of turpentine, while the cells are turned bluish 
by iodin. For treatment, remove the hair and apply tincture of 
iodin or corrosive sublimate lotion, as advised under the last para- 
graph. 
Parasite: Microsporon furfur. Mauapy: Parasitic pityriasis— 
This attacks the horse’s head where the harness presses, and leads to 
dropping of the hair, leaving bald patches covered with a branlike 
scurf, without any eruption, heat, tenderness, swelling, or rigidity of 
the skm. A lotion of carbolic acid 1 dram and water 24 ounces is 
usually applied to effect a cure. 
ANIMAL PARASITES OF THE SKIN. 
ACARIASIS, OR MANGE. 
This affection is due to the irritation of the skin caused by the 
presence of nearly microscopic acari, or mites. The disease varies, 
however, according to the species of acarus which infests the skin, so 
that we must treat of several different kinds of acariasis. 
Parasite: Sarcoptes scabiet equi. Matavny: Sarcoptic acariasis.— 
This is the special Sarcoptes of the horse, but under favorable condi- 
tions it can be transmitted to ass and mule, and even to man, and may 
live indefinitely on the human skin. The mite (Pl. XX XIX, fig. 1) 
is nearly microscopical, but may be detected with a magnifying lens 
among moving scurf taken from the infected skin. Like all Sar- 
coptes, it burrows little galleries in and beneath the scurf skin, where 
it hides and lays its eggs and where its young are hatched. It is 
therefore often difficult to find the parasite on the surface, unless the 
skin has been heated by a temporary exposure to the sun or in a 
warm room. The mite may be detected more readily by placing 
1Revised by M. C. Ifall, 
