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.

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