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Trichomonadida is an order of anaerobic protists, included with the parabasalids. Members of this order are referred to as trichomonads.

Quick Facts Scientific classification, Families ...
Trichomonadida
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Two T. vaginalis trophozoites. Colorized SEM
Scientific classification Edit this classification
Domain: Eukaryota
Phylum: Metamonada
Subphylum: Trichozoa
(unranked): Parabasalia
Order: Trichomonadida
Brugerolle & Lee 2000
Families
  • Calonymphidae
  • Cochlosomatidae
  • Devescovinidae
  • Monocercomonadidae
  • Trichomonadidae
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Some organisms in this order include:

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Anatomy

Species in this order 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, a pelta, a costa, and parabasal bodies. In Histomonas only one flagellum and a reduced axostyle are found, and in Dientamoeba, both are absent.

Behavior

Most species are either parasites or other endosymbionts of animals.

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.[1]

Treatment

The preferred treatment for trichomonad infection is metronidazole.[2]

References

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