TRICHINAE. 
55 
conjunctive. These phenomena, either singly or collectively, 
may come to pass in swine or any other animal, entirely aside 
from any anticipatory trichin-infection. 
The above mentioned phenomena must be looked upon as evi¬ 
dence of the irritation caused by the parasite in the intestinal 
mucosa, hence, swine dying or killed at this stage of the invasion 
would present the same pathological phenomena as those suffer., 
ing from an intestinal catarrh of like grade. As the migration 
of the embryonal trichinae gradually ceases, so do these abdomi¬ 
nal phenomena relax in severity and finally disappear, unless a 
second invasion takes place. In their place appear phenomena 
more or less indicative of a disturbance of the motor functions. 
If these do not lead to death, they in their turn gradually cease 
with the encapsulation of the trichinae. 
Although the presence of trichinae in the intestinal tract pro¬ 
duces the phenomena of catarrh, yet in these experimental animals 
—swine—it was impossible to find any embryos among the foeces 
passed by them. This, by no means, excludes the possibility of 
finding them in such masses by others, yet the irritation caused 
by the trichinae is so great, and the secretion of mucus so pro¬ 
fuse, that the intestinal canal is lined by a viscid coating of suffi¬ 
cient volume to protect the majority of the trichinae from the 
movements of the cliymus and foeces in their passage. 
Further, the accidental trichin-invasions to which swine are 
subjected in their ordinary course of life, are not generally ac¬ 
companied bv the introduction of such masses of trichinae into the 
organism as takes place by experimental feeding. Hence, the ca¬ 
tarrh produced would be by no means so profuse as by intentional 
feeding. 
In none of the experimental swine, and at no time during the 
course of the experiments, were phenomena to be seen at all anal- 
agous to the more or less extensive subcutaneous oedema which 
comes to pass in man when infected with the parasites in question, 
and which serves essentially to support the diagnosis. The ex¬ 
periments of Prof. Leisering, the cultivated anatomist of the 
Royal Veterinary Institute at Dresden, entirely agree with the 
above. He says, “ Bericht wher das Veterinair wesen in lxonig- 
