Microscopy. Cysts Chilomastix mesnili cysts are usually lemon-shaped and measure µm in length. They contain a large single nucleus. Chilomastix mesnili (Nonpathogen). Organism: This organism belongs to the flagellates, is a nonpathogen, and causes no disease. Both the trophozoite ( usual. Chilomastix mesnili is an apparently nonpathogenic (i.e., commensal) flagellate found worldwide in the human cecum and/or colon. Non-human animals may.

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The cyst stage is resistant to environmental pressures and is responsible for transmission of Chilomastix. Both cysts and trophozoites can be found in the feces diagnostic stages.

Infection occurs by the ingestion chilomaatix cysts in contaminated water, food, or by the fecal-oral route hands or fomites. In the large and possibly small intestine, excystation releases trophozoites.


Animals may serve as a reservoir for Chilomastix. Chilomastix mesnili is considered nonpathogenic.

Chilomastix – Microscopy Findings

Image taken at x magnification. Cyst lower and trophozoite upper of C.

Morphologic comparison with other intestinal parasites. DPDx is an education resource designed for health professionals and laboratory scientists.

Chilomastix mesnili

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Recommend on Facebook Tweet Share Compartir. Life Cycle The cyst stage is resistant to environmental pressures and is responsible for transmission of Chilomastix.

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Image Gallery Chilomastix mesnili trophozoites, trichrome stain. Chilomastix mesnili is a flagellated protozoan generally regarded as nonpathogenic in the human host.

The anterior end is rounded and contains a single nucleus with an eccentric karyosome. The posterior end tapers off to a point. Get Email Updates To receive email updates about this page, enter your email address: January 3, Page last updated: January 3, Content source: Linking to a non-federal site does not constitute an endorsement by HHS, CDC or any of its employees of the sponsors or the information and products presented on the site.