A genus of aphasmid nematodes (sometimes improperly termed Trichocephalus) related to the trichina worm, Trichinella spiralis, and having a body with a slender, elongated, anterior portion threaded into the mucosa of the colon or large intestine of the host and a thick posterior portion bearing reproductive organs and their products. Trichuris contains about 70 species, all in mammals.
[tricho- + G. oura, tail]
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