Stomach worms (Arduenna strongylina, Physocephalus sexalatus 
and Hyostrongylus rubidus) : Oil of chenopodium as for ascarids. This 
drug mixed with castor oil and milk and given in feed removed about 
60 per cent of the Arduenna present in an experiment animal, judging 
the efficacy from the worms passed and those left postmortem; worms 
passed for four days. As noted in regard to stomach worms in horses 
and sheep, probably some worms were digested after being killed and 
the drug was probably distinctly more effective than the fecal findings 
indicate. With this evidence as to the efficacy of the drug when 
given in feed, it seems safe to assume that it will be more effective 
when properly administered. The stomach worms which are protected 
by burrowing in the mucosa or which are embedded in a thick mucous 
coating may be and probably are protected from the action of an¬ 
thelmintics. 
Nodular worms: No satisfactory treatment known. The cheno¬ 
podium treatment as given for ascarids will remove some nodular 
worms. 
Thorny-headed worms: No effective treatment known as yet. 
Turpentine and copper sulphate have each been recommended, but we 
lack experimental evidence in regard to these drugs. Oleoresin of 
male fern has been found effective in a case of human infestation with 
one. species of thorny-headed worms, not the species in swine, and 
would be worth trying against the swine parasites. 
Tapeworms: Many writers give treatments for tapeworms in 
swine. For practical purposes, swine are not infested with adult tape¬ 
worms. The; few reported cases of these worms in swine apparently 
deal. with, tapeworms of sheep or other animals, these tapeworms hav¬ 
ing been swallowed by swine in eating the intestines of the true host, 
or with tapeworms of animals other than swine which have undergone 
partial development in swine but have remained sterile in the unusual 
host. . 
