color = khaki
name = Trichomonads
domain = Eukaryota
classis = Parabasalia
ordo = Trichomonadida
ordo_authority = Brugerolle & Lee 2000
subdivision_ranks = families
Calonymphidae Cochlosomatidae Devescovinidae Monocercomonadidae TrichomonadidaeThe 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.
* [http://parasitology.informatik.uni-wuerzburg.de/login/n/h/1484.html General info]
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