FAVVS 4Sf> 



is due to the infection being acquired from mice and rats 

 affected with the disease. In dogs and cats the lesions appear 

 as a sulphur-yellow, circular mass depressed in the center 

 and free at the edges, the size of a ten-cent piece. A number 

 of areas in contact do not merge but encroach upon one 

 another producing irregular shaped figures. In birds the 

 crusts are thinner than in mammals and the areas tend to 

 coalesce until a large surface is formed covered by a creviced 

 crust. When feathered parts of the skin are invaded the 

 feathers fall out. The disease may extend all over the body. 



Pruritus is rare and it is seldom that the crusts are rubbed 

 or scratched off. 



Diagnosis.— The presence of the sulphur-yellow, favic cup 

 and slow growth make it easily recognized. In birds the 

 mouldy appearance and progressive growth indicate the 

 character of the disease. 



Prognosis.— The prognosis is favorable; the disease may 

 heal spontaneously. If far advanced and generalized in 

 birds it is usually fatal. 



Treatment.— Remove the crusts with a blunt instrument 

 damaging the skin as little as possible. Wash or otherwise 

 cleanse the skin and apply tincture of iodin diluted well with 

 alcohol. Bichlorid of mercury (1-500) is equally good. 

 Dilute silver nitrate solution (2 per cent.) may also be used. 

 Usually 5 to 6 daily treatments are sufficient. 



