Small trichostrongyles (Nematodirus, Cooperia, Ostertagia and 
Trichostrongylus): Carbon tetrachlorid in doses of 12 to 48 cc. re¬ 
moved 82 per cent of these worms from four infested sheep. From two 
other sheep it removed 3 to 27 per cent. From two other sheep 
doses of 4 to 12 cc. apparently failed to remove any trichostrongyles 
of the genera named. This is the only drug yet reported as capable 
of removing these worms, but further investigations are necessary 
to determine the best dose and mode of administration. The drug 
seems especially effective against species of Nematodirus, these being 
blood-sucking forms and distinctly pathogenic. 
Tapeworms: Copper sulphate and tobacco solution as for stomach 
worms. Efficacy, usually 100 per cent. Copper sulphate solution alone 
will remove some tapeworms. 
Sodium arsenite and copper sulphate as for stomach worms. 
Treatments which have been said to be effective, but concerning 
which we have no evidence from critical tests are: Kamala, one dram 
to lambs; kousso, two drams to lambs; koussin, two grain doses; oleo- 
resin of male fern, one dram with two to four fluid ounces of castor 
oil; areca nut, freshly ground, one to three drams to lambs. 
TREATMENTS FOR SWINE PARASITES 
Ascarids: Fast 24, preferably 36, hours. Oil of chenopodium, one 
fluid dram (3.75 cc.) in or immediately preceded or followed by two 
fluid ounces (ca. 64 cc.) of castor oil for animals weighing 100 pounds 
(45 kilos). Diminish dose of chenopodium for small animals in pro¬ 
portion to weight, but use at least one ounce of castor oil; for larger 
animals the dose of castor oil should be increased, up to four ounces 
for very large animals. Chenopodium requires adequate purgation 
to offset its constipating and toxic action. In default of castor oil, 
which is bulky, it has been suggested that salts be given in soft 
feed of some sort three hours after treatment; no reports on the results 
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