PARASITIC DISEASES. 169 



Symptoms: These are very pronounced. The 

 infected animal runs around snuffing as though 

 it had something in its nose. The rest of the 

 band keep their noses close to the ground and 

 show signs of fear. Later, the infected sheep 

 lies down, sneezes, rolls its head in every con- 

 ceivable shape and exhibits the greatest of ex- 

 citement. The eyes grow watery while the nasal 

 membranes are inflamed. 



To differentiate from gid is comparatively 

 easy. There is no violent staggering around in 

 a circle, and no disturbance of the functions of 

 the nervous system, the nasal catarrh being 

 the most prominent symptom. 



Treatment: After infection, this is practically 

 hopeless. Some good results have been reported 

 by mixing snuff in olive oil and pouring it in 

 the nose, while holding the victim on its back. 

 Wire snares formed of small loops have also been 

 tried. 



Prevention is the only logical procedure. Keep 

 the nose well smeared with tar. In a large band, 

 this is done by boring large holes in a plank, 

 smearing the edges with tar, and filling up with 

 salt. 



3. Lung Worms. 



Hoose; husk; snots; verminous bronchitis. 



The Strongylus filaria, a small, reddish-brown 

 round worm, less than an inch long, and about 

 as thick as a thread, is the parasite responsible 

 for this disastrous disease. 



The life history of this worm is not exactly 



