Oxyuris, though chiefly parasitic in the Mammalia, occurs also in reptiles, Amphibia and one or two insects.
This simple type of life-history has been experimentally proved by Leuckart to be characteristic of Trichocephalus affinis, Oxyuris ambigua and other species.
The threadworm or Oxyuris vermicularis is a common parasite infecting the rectum.
nigrescens live in damp earth and may be seen after storms or early in the morning crawling up the stalks of plants, a fact which causes people to talk about showers of worms. The eggs are laid on 1 Ercolani successfully cultivated Oxyuris curvula, Strongylus armatus and other species in damp earth; the free generation was found to differ from the parasitic by its small size, and by the females being ovoviviparous instead of oviparous.
The infusion is useful as a bitter tonic - a group of substances of which calumba is the type - and is also a very efficient anthelmintic for the threadworm (Oxyuris vermicularis).
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