310 



THE DISEASES OF SHEEP. 



Prevention consists in destroyi ng the brain instead of 

 throwing it to the dogs. Keep dogs as free from tape- 

 worms as possible. 



Fig. 148. Large conic Trephine on handle ; small conic on right ; cyl- 

 indric on left. 



Remedy. — Trephine; remove by trocar. But it is 

 better to kill the animal as soon as it shows symptoms 

 of the disease, and make the best of it. 



HOOSE OR HUSK, 



Scientifically known as verminous bronchitis, a parasitic 

 disease of lambs and calves, is caused by a round worm 

 (Strongylus.filarius), which when mature resembles a piece 

 of white thread. The female, which is larger than the 

 male, is about 1-J to 2 inches' long. It inhabits the wind- 

 pipe and bronchial tubes, but its embryos gain access to 

 the deeper parts of the lungs, causing much irritation 

 and patchy inflammation. The development of the worm 

 is not understood. One thing, however, is certain — salt 

 spread over the contaminated pastures is a preventive. 

 Drainage is also useful. Destroy the lungs instead of 

 feeding them to either people or cats. Cooking, however, 

 kills the worms. 



