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Chilomastix mesnili is a flagellated protozoan generally regarded as nonpathogenic in the human host. Trophozoites are pear-shaped and usually measure 6–24 µm in length. The anterior end is rounded and contains a single nucleus with an eccentric karyosome.
Chilomastix mesnili is a non-pathogenic member of primate gastrointestinal microflora, commonly associated with but not causing parasitic infections. It is found in about 3.5% of the population in the United States. In addition to humans, Chilomastix is found in chimpanzees, orangutans, monkeys, and pigs. It lives in the cecum and colon.
The flagellates Enteromonas hominis, Retortamonas intestinalis, and Pentatrichomonas hominis are considered non-pathogenic. These are less frequently encountered than Chilomastix mesnili, another non-pathogenic flagellates. The presence of cysts and/or trophozoites in stool indicates exposure to fecal contamination.
Resembles Chilomastix cyst. Shadow outline of cytostome with supporting fibrils extends above nucleus.
Mar 6, 2024 · Chilomastix mesnili, though often considered non-pathogenic, can cause gastrointestinal discomfort and other health issues in some individuals. Understanding its mode of transmission, symptoms, diagnosis, and available treatments is crucial in managing and preventing infection.
Chilomastix has a resistant cyst stage responsible for transmission and a trophozoite stage, which is recognized as the feeding stage. Chilomastix mesnili is one of the more studied species in this genus due to the fact it is a human parasite.
Chilomastix mesnili occurs as both cysts and trophozoite and is larger than Trichomonas hominis, being usually 10–15 µm in length, although it may occasionally be as large as 20 µm. The trophozoite has a large spiral longitudinal cleft anteriorly and an anterior single nucleus.
Cysts of other, non-pathogenic, intestinal protozoa, including Chilomastix mesnili, Enteromonas hominis and Retortamonas intestinalis, may be mistaken for G. lamblia, but they are usually smaller and lack the regular oval shape and characteristic internal morphology.
Chilomastix mesnili was cultured continuously from January 27 to June 15, 1920, in an artificial medium composed of one part of human serum and four parts of Locke's solution with the addition of a small amount of dextrose.
Chilomastix mesnili is a flagellated protozoan generally regarded as nonpathogenic in the human host. Trophozoites are pear-shaped and usually measure 6-24 µm in length. The anterior end is rounded and contains a single nucleus with an eccentric karyosome.
