INTERNAL PARASITES 197 
the parasites, whereupon they are expelled by coughing. A coiled 
horse hair is frequently employed for the same purpose, but like the 
feather its use is dangerous to the chick. A few worms may be 
caught with tweezers if the larynx is raised high enough. 
It has been asserted that pounded garlic in the proportion of one 
bulb per day added to the food of ten birds would result in the ex- 
pulsion of the worms. Asafcetida has been administered in the food 
with the idea that the agent, eliminated through the air passages, 
would kill the parasites. 
Fumigation with various agents has been employed. Exposure to 
sulphur fumes has been used to induce coughing and expulsion of 
the worms but is dangerous. Affected birds may be exposed to 
tobacco smoke until they become almost insensible, after which they 
are allowed to recover in the open air. Fumes of heated carbolic 
acid have been employed. 
Klee has great confidence in intra-tracheal injection which re- 
quires no more time than other more dangerous kinds of individual 
treatment and is regarded as more effective. The affected bird is in- 
jected in the trachea with 1 ¢.c. of a 5 per cent aqueous solution of 
sodium salicylate, administered with a hypodermic syringe. This 
fluid simultaneously loosens all the parasites occurring there and a 
Fia. 30. Apparatus for making injections in trachea. a, Syringe; b, Straight 
canula; c, Curved canula. (Klee) 
