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Trophozoites undergo encystation to produce infective cysts . Some trophozoites invade the wall of the colon and multiply, causing ulcerative pathology in the colon wall. Some return to the lumen and disintegrate. Mature cysts are passed with feces.
Oct 23, 2023 · Cysts are considered the main infective stage; trophozoites can also be passed in stool but generally disappear soon after passage [ 4 ]. CLINICAL MANIFESTATIONS. Three forms of B. coli infection can occur: asymptomatic cyst excretion, acute colitis, and chronic infection [ 9-11 ].
Life cycle of Balantidium infection in humans. The trophozoites and cysts are shed in feces (1), and if the cysts, in particular, contaminate drinking water or food, the infection can be spread to other humans (2). Fruits and vegetables may also be contaminated by cysts and serve as a means of transmission.
- Frederick L. Schuster, Lynn Ramirez-Avila
- 10.1128/CMR.00021-08
- 2008
- Clin Microbiol Rev. 2008 Oct; 21(4): 626-638.
Jan 5, 2022 · Although drinking water can act as a carrier of B. coli cysts, their large size allows them to be easily removed by filtration; furthermore, they do not remain in suspension as easily as smaller cysts of other waterborne protozoa (i.e., Cryptosporidium spp., Giardia duodenalis or Entamoeba spp.).
- 10.1016/j.fawpar.2021.e00143
- 2022/03
Aug 25, 2023 · The specimen of choice for diagnosing balantidiasis is stool. At least three stool samples should be collected at intervals since parasites are excreted intermittently. In cases of low...
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.
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