PARASITES AFFECTING THE SKIN 5 
course, and produces no systemic disturbance, and is 
spontaneously curable, providing cleanliness is main- 
tained. In dirty, emaciated, half-starved animals it 
tends to remain. Trichophytosis is transmissible from 
horses to the attendants, and produces serious lesions 
on unprotected parts, such as the arms and face. It is 
also transmissible to cattle. 
Favus in Sucklings. 
This is a rarer condition, and is characterized by the 
presence of scabs or discs of a greyish colour externally, 
Fic. 1.—TRICHOPHYTON TONSURANS, 
and which are yellow in their deeper parts—that is to 
say, when the surface is scratched away. They seldom 
exceed 3 inch in diameter, and are confined chiefly to 
the region of the head; but a few isolated crusts may 
appear on various parts of the abdomen, and more 
particularly on the quarters. Favus is never trans- 
mitted to other animals. 
