color = khaki
name = Trichomonads

domain = Eukaryota
unranked_phylum = Excavata
phylum = Metamonada
classis = Parabasalia
ordo = Trichomonadida
ordo_authority = Brugerolle & Lee 2000
subdivision_ranks = families
subdivision =
The trichomonads are an order of anaerobic protists, included with the parabasalids. Most are either parasites or other endosymbionts of animals. They typically have four to six flagella at the cell's apical pole, one of which is recurrent - that is, it runs along a surface wave, giving the aspect of an undulating membrane. Like other parabasalids they typically have an axostyle, pelta, costa and parabasal bodies. In "Histomonas" there is only one flagellum and a reduced axostyle, and in "Dientamoeba" both are absent.

Trichomonads reproduce by a special form of longitudinal fission, leading to large numbers of trophozoites in a relatively short time. Cysts never form, so transmission from one host to another is always based on direct contact between the sites they occupy.

Some organisms in this order include:
*"Trichomonas vaginalis", an organism living inside the vagina of humans
*"Dientamoeba fragilis", parasitic ameboid in humans
*"Histomonas meleagridis", parasite that causes blackhead disease in poultry.
*"Mixotricha paradoxa", a symbiotic organism inside termites, host of endosymbionts.

External links

* [ General info]

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Look at other dictionaries:

  • trichomonad — [trik΄ə mō′nad, trik΄əmän′ad] n. [< ModL Trichomonas (gen. Trichomonadis): see TRICHO & MONAD] any of a genus (Trichomonas) of parasitic or commensal zooflagellates …   English World dictionary

  • trichomonad — noun Etymology: New Latin Trichomonad , Trichomonas, from trich + Late Latin monad , monas monad Date: 1861 any of a genus (Trichomonas) of flagellated protozoans parasitic in many animals • trichomonad or trichomonal adjective …   New Collegiate Dictionary

  • trichomonad — trichomonadal /trik euh mon euh dl, moh neuh /, trichomonal /trik euh mon l, mohn l, tri kom euh nl/, adj. /trik euh mon ad, moh nad/, n. any flagellate protozoan of the genus Trichomonas, parasitic in humans or animals. [1860 65; < NL… …   Universalium

  • trichomonad — Common name for members of the family Trichomonadidae. * * * tricho·mo·nad .trik ə mō .nad, nəd n any protozoan of the genus Trichomonas trichomonad adj TRICHOMONAL * * * tricho·mo·nad (trik″o moґnad) (trik″o monґad) [tricho + monad]… …   Medical dictionary

  • trichomonad — trich•o•mon•ad [[t]ˌtrɪk əˈmɒn æd, ˈmoʊ næd[/t]] n. mcr any flagellate protozoan of the genus Trichomonas, parasitic in humans or animals • Etymology: 1860–65; < NL Trichomonad , s. of Trichomonas. See tricho , monad trich o•mon′a•dal,… …   From formal English to slang

  • trichomonad — noun Any of many flagellate protozoans, of the genus Trichomonas, most of which are parasitic …   Wiktionary

  • trichomonad — trich·o·mon·ad || ‚trɪkəʊ mÉ‘næd / mÉ’næd n. flagellate protozoan parasite which causes the sexually transmitted disease trichomoniasis …   English contemporary dictionary

  • trichomonad — [ˌtrɪkə(ʊ) mɒnad] noun Zoology & Medicine a parasitic protozoan of an order (Trichomonadida) with four to six flagella, infesting the urogenital or digestive system. Derivatives trichomonal adjective Origin C19: from mod. L. Trichomonadida, from… …   English new terms dictionary

  • trichomonad — trich·o·mon·ad …   English syllables

  • trichomonad — /trɪkoʊˈmɒnæd/ (say trikoh monad) noun any flagellate protozoan of the genus Trichomonas, parasitic in humans and animals …   Australian-English dictionary

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