256 PARASITIC DISEASES 



partial development. The irritation to the blood-vessel results 

 in an inflammation and dilation of the vessel wall. This is 

 termed verminous aneurism. A portion of the fibrin-like lining 

 of the aneurism may flake off and drift along in the blood stream, 

 until finally a vessel that is too small for the floating particle or 

 embohis to pass through is reached. The vessel is then plugged 

 or a thrombus is formed. If the vessel involved by the throiubus 

 happens to be a mesenteric vessel, then a loop of intestine has 

 its blood supply cut off, and colicky pains result. Such colics are 

 dangerous, and may terminate fatally. Intestinal obstruction, 

 thrombo-embolic colics, unthriftiness and a weakened, annemic 

 condition may be caused by intestinal wonus. 



The treatment is both preventive and medicinal. The pre- 

 ventive treatment consists in giving young, growing animals 

 the best care possible. Cleanliness about the stable, giving the 

 colt plenty of range when running in a pasture, and feeding a 

 ration that is sufficient to keep the colt in good physical condition 

 are the important preventive measures. Tartar emetic in one- 

 half to one dram doses may be given with the feed daily until 

 five or six doses are given. Turpentine may be given in one to 

 three ounce doses in a pint of linseed oil. This may be repeated 

 daily for two or three days. Worms located in the posterior 

 bowel may be removed by rectal injections of a weak water infu- 

 sion of quassia chips. The rectum should be first emptied with 

 the hand, and the nozzle of the syringe carried as far forward 

 with the hand as possible. The injections should be repeated 

 daily for several days. 



Intestinal Worms of Cattle. — lutestinal worms seldom 

 cause serious losses from unthriftiness or death in cattle. It is 

 in calves only that we are called on to treat this class of disease. 

 The symptoms resulting from the invasion of the intestinal tract 

 by the different worms vary in severity according to the number, 

 habits of the parasite and care that the animal receives. The 

 usual symptoms are unthriftiness, indigestion, diarrhoea and a 



