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In the Trichina, a parasitic roundworm, the bodies of several animals, particularly the rat, are host for developing eggs. If the rat is eaten by a carnivorous animal, these excessively small young are liberated during the process of digestion and rapidly assume the adult condition in the alimentary canal, giving rise to young which pursue again the same course of development.

Roundworm

In the Trichina, a parasitic roundworm, the bodies of several animals, particularly the rat, are host…

Trichina. 1) Female; 2) Male.

Trichina

Trichina. 1) Female; 2) Male.

Trichina parasitic worms, as sometimes found in the muscles of a person who has eaten pork not well cooked.

Trichina in Muscle

Trichina parasitic worms, as sometimes found in the muscles of a person who has eaten pork not well…

"Trichina Spiralis is the name given to a peculiar nematoid worm which inhabits the muscles, usually of the pig. The viviparous females, originally living in rats, being about eight days after entering the intestines of their second host, a pig, to give birth to the larvæ, which pass into various parts of the body, especially the muscles, where they coil up in a sack, or cyst, which eventually becomes calcareous and whitish. When pork thus infected is eaten the worms are set free in the stomach of their third host (man), and in three or four days there become sexually mature, each female being capable of producing 1,000 young."—(Charles Leonard-Stuart, 1911)

Trichina Spiralis

"Trichina Spiralis is the name given to a peculiar nematoid worm which inhabits the muscles, usually…

"Trichina Spiralis is the name given to a peculiar nematoid worm which inhabits the muscles, usually of the pig. The viviparous females, originally living in rats, being about eight days after entering the intestines of their second host, a pig, to give birth to the larvæ, which pass into various parts of the body, especially the muscles, where they coil up in a sack, or cyst, which eventually becomes calcareous and whitish. When pork thus infected is eaten the worms are set free in the stomach of their third host (man), and in three or four days there become sexually mature, each female being capable of producing 1,000 young."—(Charles Leonard-Stuart, 1911)

Trichina Spiralis

"Trichina Spiralis is the name given to a peculiar nematoid worm which inhabits the muscles, usually…