TRICHINAE. 
501 
ered in Germany, England, Scotland, Denmark, Sweden, France, 
Italy, North and South America, Africa, India, Australia, Spain, 
Egypt and Syria. 
In fact it may truly be said that trichinae have been found 
infecting pork in whatever land and wherever they have been 
sought for. 
Trichinae have only been unquestionably found in warm-blooded 
animals, that is, by natural invasion, viz., man, cats, dogs, rabbits, 
mice, rats, foxes, the marmot, wild hogs, and even the hippopota¬ 
mus. Gerlach has produced them in calves and the horse by 
feeding experiments, while Liesering was unable to produce inva¬ 
sion in the horse. 
Several reports have been published with reference to the dis. 
covery of trichinae in fish and other cold-blooded animals, but they 
are of a questionable nature, and non-conformable to our knowl¬ 
edge of the activities of the parasite. They become torpid at a 
temperature but little below that of the normal mammal. They 
do not seem to affect fowl, but have been found in the goose. In 
this regard I made quite a series of experiments with hens : 
Tirst .—I fed them in the natural way, with a large quantity 
of highly infected pork. Results, negative. 
Second .—Assuming the triturating power of the gizzard might 
have power to destroy the parasites, before they could gain access 
to the intestines, I caused a quantity of infected pork to be hashed 
unil it became a veritable mush, and contained, by microscopic 
examination, numerous free trichinoe. This mass was then stirred 
up with water at 40° C., into a sort of thin gruel, and injected 
into the intestines of the hens, after they had first been washed 
out with warm enemas. The injected mass was kept from flow¬ 
ing out by artificial means; but although the hens lived, infec¬ 
tion did not take place. 
Third .—The abdominal cavity was opened in quite a number 
of hens, and the above mass, two tablespoons, put therein, the 
wound being afterwards carefully sewed up. Notwithstanding 
this insult the fowls lived, but no muscle trichinae at the end of a 
month. 
