PARASITES AFFECTING THE SKIN 4 
the tips of the ears, the paws, and the face, and is seen 
more often in kittens and rather seldom in old cats, 
The lesions take the form of lemon-yellow crusts, which 
are at first firm and moist, but later become dry and 
inclined to crumble on pressure. Their appearance is 
very characteristic. 
Therapeutics —In treating a case of ringworm, as 
in other parasitic skin diseases, it is first necessary to 
isolate the affected animals, and to provide fresh litter. 
All clothing and grooming utensils should be thoroughly 
disinfected. 
Horses suffering from trichophytosis should have the 
affected parts thoroughly washed with hot soda-water. 
When quite dry, they should be dressed with para- 
siticides. If the areas are small in extent, nothing is 
better than ung. iodi, or even half-strength tinct. 
iodi. 
Formalin 4 per cent. in water, to which 5 per cent. 
glycerin has been added, is useful. 
Lysol, creolin, naphthol, or salicylic acid may be 
used. In calves, where the areas affected are large, 
a dressing composed of sulphur, combined with ol. picis 
and an alkali in oil, is best, such as the following : 
B Sulph. flores. .. or ay .. 3iv. 
Liq. potasse .. be a .. Bij. 
Ol. picis me ae = .. Bij. 
Ol. rapii ie me ad O.j. 
M. Fiat lin. 
In dogs and cats preparations of iodine are probably 
best, and care must be taken to prevent access to mice 
and rats, which may have introduced the disease. 
The treatment of favus is similar to that of trichophy- 
‘tosis. The crusts should be first removed, and the 
affected areas well washed, after which any of the para- 
siticides mentioned may be used. In treating ringworm 
it must be remembered that the patches extend from 
