Diseases of the Skin 



239 



the skin of the eye-Hds and its neighborhood, the entire eye 

 will become covered with mulberry-like proliferations of 

 various sizes." 



The presence of these nodules on the epithelium of the 

 head is often (but apparently not always) accompanied with 



Fig. 54. Sore-heud on comb, eyelids and 



(After Hadley and Beach.) 



characteristic roup lesions of the nasal cavities, mouth and 

 throat. As long as the disease is confined to the skin of the 

 head the general health of the bird does not seem to be af- 

 fected. Recovery may take place without treatment in 

 from 10 to 20 days. The nodules in such cases dry up and 

 fall off. Usually, however, the disease is not self-limited, 

 but advances. The eyes may become closed so that the 



