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- The cyst represents the nonreplicating infective stage. B coli forms a large spherical cyst that may grow to 60 µm in diameter. The cyst contains a macronucleus, a micronucleus, and a granular cytoplasm.
emedicine.medscape.com › article › 213077-workupBalantidiasis Workup: Laboratory Studies, Imaging Studies ...
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Is Balantidium coli a trophozoite or cyst?
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Where do balantioides coli cysts come from?
Balantidium (= Neobalantidium) (= Balantioides) coli, a large ciliated protozoan, is the only ciliate known to be capable of infecting humans. It is often associated with swine, the primary reservoir host. Recent molecular analyses have suggested the need for taxonomic revision, and it is now sometimes referred to as Neobalantidium coli or ...
Balantidium coli lives in the cecum and colon of humans, pigs, rats, and other mammals. It is not readily transmissible from one species of host to another because it requires a period of time to adjust to the symbiotic flora of the new host. Once it has adapted to a host species, the protozoan can become a serious pathogen, especially in humans.
Aug 25, 2023 · B coli forms a large spherical cyst that may grow to 60 µm in diameter. The cyst contains a macronucleus, a micronucleus, and a granular cytoplasm. Cilia may be found in young cysts but...
Jan 5, 2022 · Trophozoites and cysts of B. coli are large and easily seen under optical microscopy at 10-40× magnification. Vegetative cells usually move slowly in a helical fashion; they are ovoid or pear-shaped, up to 150 μm in length, with cilia covering the entire cell surface.
- 10.1016/j.fawpar.2021.e00143
- 2022/03
Oct 23, 2023 · Three forms of B. coli infection can occur: asymptomatic cyst excretion, acute colitis, and chronic infection . Most cases are asymptomatic; patients with comorbidities (particularly immunosuppression) or other infections are at increased risk for developing symptomatic infection [ 12-14 ].
May 15, 2024 · Balantidium coli infects the large intestine in humans and produces infective microscopic cysts that are passed in the feces, potentially leading to re-infection or infection of others. People compromised immune systems are the most likely to experience more severe signs and symptoms.
Balantidium cysts are larger (40 to 60 μm) than ameba cysts and are binucleate (macro- and micronuclei), and at times the trophic organism can be seen spinning within the cyst wall due to ciliary activity.
