Is the trichina a dangerous parasite? Is it found in other animals besides the hog?
Trichina
Q. Is the trichina a dangerous parasite? Is it found in other animals besides the hog?
A. The trichina is usually
found in pork, though it may infest the flesh of numerous other animals as
well. Cases have been reported in England, in which it was found in calves. It has also been recently discovered in the hippopotamus. It exists only in the
lean flesh of animals, and is found among the
muscular fibres or enclosed in little sacs or capsules. When taken into the stomach by
eating of flesh containing it, the worm is soon liberated
from its capsular prison, and in the course of
a week undergoes complete development.
It speedily brings
forth young in immense numbers, a single worm producing, it is stated, one thousand or more young. The
young worms very quickly begin to penetrate the system,
either by boring their way through the intestinal walls and thence to the
muscles, their final destination, or by
getting into the blood vessels and being swept
along with the blood current. Which is the real method of distribution
has not yet been determined.
After reaching the muscles
it penetrates the sheaths of the fibres,
and finally becoming quiet, coils itself up and after a time becomes encapsulated.