purgation; oil immediately following treatment especially contrain¬ 
dicated. Bots pass for over 17 days. Efficacy, approximately 100 per 
cent. Carbon tetrachlorid in 25 to 50 cc. doses is approximately 25 per 
cent effective in removing bots. Other drugs are ineffective. 
Ascarids: The same treatment as for bots. Oil immediately fol¬ 
lowing treatment contraindicated. Worms may pass for several days. 
Efficacy approximately 100 per cent for carbon bisulphid and appar¬ 
ently the same for carbon tetrachlorid. 
Palisade worms (Strongylus spp.) : Fast 36 hours. Oil of cheno- 
podium, 16 to 20 cc. (4 to 5.3 fluid drams) in capsule, followed imme¬ 
diately by one liter (approximately one quart) of raw linseed oil 
or by aloes ball. Worms may pass for six days or more. Efficacy, 
95 to 100 per cent. 
Another treatment: Fast 36 hours. Oil of turpentine, 64 cc. (two 
fluid ounces), in capsule, followed immediately by a liter of raw 
linseed oil or aloes ball. Efficacy (ascertained on one animal only), 
approximately 50 per cent. 
Another treatment: Carbon tetrachlorid, 25 to 50 cc. (6.5 to 13 
fluid drams), in capsule. No purgation. Efficacy, 100 per cent. 
Cylicostomes: The same treatment as for palisade worms. Worms 
pass for six to twelve days. Efficacy, approximately 100 per cent for 
chenopodium and oil of turpentine; variable for carbon tetrachlorid— 
from 100 per cent to less than 50 per cent. 
Pinworms: Oil of chenopodium or turpentine as for palisade 
worms. Worms pass for two days. Efficacy, 100 per cent. 
Stomach worms (Habronema spp): Uncertain. It is probable 
that carbon bisulphid, carbon tetrachlorid, oil of chenopodium, and 
possibly turpentine and other drugs will kill the worms in the lumen 
of the stomach, but it is difficult to obtain evidence on this subject 
as worms killed in the stomach are probably digested as a rule. The 
worms embedded in the mucosa or buried under mucus appear to be 
adequately protected against the action of these and other known 
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