238 



PARASITIC DISEASES 



Horses and mules show a staring, dirty, rough coat. The 

 mane and tail may become broken and matted. The animal 

 nibs against the stall, fences and trees, and bites the skin in its 

 efforts to relieve the irritation. On examining the coat, nits are 

 fonnd adhering to the hair (Fig. G5). We should examine the 

 parts of the skin covered by the long hair for the sucking lice ; 

 and the withers, abdomen and limbs for the biting lice. 



, ^ 



I 



FiQ. 64. — Sucking louse (much enlarged). 



Fio. G.5. 



-Nits attached to hair (much 

 enlarged). 



The symptoms of lousiness in cattle are about the same as 

 occur in horses. Licking and rubbing the skin are prominent 

 symptoms in cattle, and the coat becomes dirty and rough. The 

 licked part is matted and curled. The lice may be discovered 

 by parting the hair along the back and rump. 



The biting louse of sheep causes the fleece to become matted 

 and tufts of wool are pulled out. This is brought about by the 

 sheep rubbing and nibbling the fleece, and the lice cutting 



