Carbon tetrachlorid in doses of 12 to 48 cc. in 60 cc. of castor oil 
has been found to remove all the stomach worms from infested sheep. 
The dose which is most satisfactory from the standpoint of efficacy 
and safety has not yet been ascertained. 
A treatment reported favorably from South Africa consists in 
the use of a mixture of sodium arsenite (testing 80 per cent arsenious 
oxid), one part, and copper sulphate, four parts. Doses: Animals two 
to four months old, 0.18 gm.; four to six months, 0.25 gm.; six to 
ten months, 0.375 gm.; one year old, 0.5 gm.; two years old or older, 
0.625 gm. This is given as a powder. Withhold food and water the 
afternoon before dosing; dose next morning; feed in afternoon; feed 
and water the next morning. Treatment may be repeated the day 
after the first dose, allowing feed the afternoon after the first dose, 
dosing the next morning, and feeding that afternoon, but allowing no 
water until the morning following the second treatment. 
Hookworms: The solution of copper sulphate and tobacco admin¬ 
istered in the same dose and manner as for stomach worms. Efficacy, 
on the basis of reported experiments (Guberlet), 100 per cent. 
Carbon tetrachlorid in doses of 15 to 30 cc. in castor oil and in doses 
of four and eight cc. in capsules removed all the hookworms from four 
infested sheep. Worms pass for two days. Further investigations are 
necessary to ascertain the minimum effective dose and the best mode 
of administration. 
Oil of chenopodium, one fluid dram (3.75 cc.) in five ounces 
(160 cc.) of milk has been found to remove about two-thirds of the 
hookworms from sheep. Worms pass for two days. 
Nodular worms: No well established treatment. Carbon tetra¬ 
chlorid in doses of 15 to 48 cc. removed from 3 to 100 per cent of the 
worms present. Further investigation necessary. Larval worms in 
nodules probably not amenable to any known treatments. 
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