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Diagnosis is based on detection of trophozoites in stool samples from symptomatic patients or in tissue collected during endoscopy. Cysts are less frequently encountered, and are most likely to be recovered from formed stool. Balantidium coli is passed intermittently and once outside the colon is rapidly destroyed. Thus stool specimens should ...
Balantidium coli as seen in a wet mount of a stool specimen. The organism is surrounded by cilia. Balantidium coli has two developmental stages, a trophozoite stage and a cyst stage. In trophozoites, the two nuclei are visible.
Aug 25, 2023 · The cyst contains a macronucleus, a micronucleus, and a granular cytoplasm. Cilia may be found in young cysts but never in mature cysts. [ 4] The cysts can be demonstrated in semiformed and...
Warming of the earth's surface may provide a more favorable environment, even in the now-temperate areas of the world, for survival of trophic and cystic stages of Balantidium, and its prevalence may increase. Effective sanitation and uncontaminated water are the most useful weapons against infection.
- Frederick L. Schuster, Lynn Ramirez-Avila
- 10.1128/CMR.00021-08
- 2008
- Clin Microbiol Rev. 2008 Oct; 21(4): 626-638.
Jan 1, 2016 · Balantidiasis, Fig. 3. Colonic lesion with several B. coli trophozoites in area of necrosis and inflammation. Original magnification × 25. Full size image. B. coli has trophozoite and cystic stages, but only trophozoites are found in tissue. Most trophozoites are oval and measure 40–80 by 25–40 μm.
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.
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Is Balantidium coli a trophozoite or cyst?
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Oct 23, 2023 · Trophozoites undergo encystation to produce infective cysts. Some trophozoites invade the wall of the colon and multiply; some return to the lumen and disintegrate. Mature cysts are passed in the stool and can remain viable for up to two weeks in the environment .
