370 PARASITIC DISEASE OF LUNGS. 



their way into the air passages, the changes going on in the 

 early stages of the disease are associated with symptoms of 

 spasmodic cough, irritation in the throat, and occasionally, as 

 some of the small worms get free and coughed up into the 

 nasal chambers, the sheep may be seen rubbing their head 

 and nostrils on the ground, and sniffling to remove the cause 

 of the irritation. It rarely happens, I believe, that large 

 accumulations of worms in the lungs do not lead to emacia- 

 tion, anaemia, and defective nutrition, with great debility 

 and dropsy, unless the animals are suffocated by a lump of 

 worms closing the windpipe. 



It has been thought by some that the constitutional 

 condition must precede the deposition of the germs and 

 the development of the strongyli in the respiratory organs, 

 but that this is not correct is proved by the animals con- 

 tinuing to thrive until, by the number of full-grown worms, 

 the breathing is disturbed, the sheep are tormented, and fall 

 back in condition. Other parasites accumulate in the liver or 

 in the alimentary canal, and the animal falls into a state of 

 hectic, with a manifest tendency to dropsy. 



Concerning the prevention and treatment of this disease, 

 it is only necessary to indicate, in the first place, the dangers 

 attending the feeding of young sheep on the second and 

 third crops of clover, after the first has been fed off by older 

 sheep. To prevent the disease, you require fresh and sound 

 pasture, and it may be necessary to supply a considerable 

 quantity of artificial food. To cure the disease, inhalations of 

 chlorine gas are recommended, or the internal administration 

 of camphor and turpentine, in oil or ether. Sound food, 

 such as oats, linseed-cake, cotton-cake, turnips, &c., must be 

 allowed, with ferruginous tonics. The iron may be given to 

 the extent of ten or twenty grains daily to each lamb, with 

 a drachm of common salt. 



