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- The trophozoite form, which measures 20 to 25 μm, is minimally mobile. The core of the trophozoite is slightly oval in shape with a nucleus surrounded by a thick membrane. Within this membrane, chromatin granules surround the large, eccentric, and irregular karyosome.
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Aug 23, 2023 · Entamoeba coli, similar to other Entamoeba specifies, has three distinct morphological forms: trophozoite, pre-cystic stage, and cystic stage. The trophozoite form, which measures 20 to 25 μm, is minimally mobile. [23]
- Akhlema Haidar, Orlando De Jesus
- 2023/08/23
Entamoeba coli is a non-pathogenic species of Entamoeba that frequently exists as a commensal parasite in the human gastrointestinal tract. E. coli (not to be confused with the bacterium Escherichia coli ) is important in medicine because it can be confused during microscopic examination of stained stool specimens with the pathogenic Entamoeba ...
Entamoeba coli, E. hartmanni, E. polecki, Endolimax nana, and Iodamoeba buetschlii are generally considered nonpathogenic and reside in the lumen of the large intestine in the human host. Both cysts and trophozoites of these species are passed in stool and are considered diagnostic .
Molecular methods are currently recommended for distinguishing pathogenic Entamoeba species. Microscopic Detection. Microscopic identification of cysts and trophozoites in the stool is the common method for diagnosing pathogenic Entamoeba species. This can be accomplished using:
The motile trophozoites feed on bacteria and tissue, reproduce, colonize the lumen and the mucosa of the large intestine, and sometimes invade tissues and organs. Trophozoites predominate in liquid stools but rapidly die outside the body and, if ingested, would be killed by gastric acids.
Entamoeba coli has a worldwide distribution and is one of the most commonly reported Entamoeba species in clinical specimens. Non-human primates may serve as reservoir hosts. Trophozoites of E. coli measure 15–50 μm and have a single nucleus with irregular peripheral chromatin and a usually eccentric karyosome.
Entamoeba dispar. In 1925, Brumpt formulated the theory that the difference between many asymptomatic amebic infections and those of individuals with amebic disease could be correlated with the existence of two distinct but morphologically identical species, namely, E. histolytica (which is capable of causing invasive disease) and E. dispar (which never causes disease).
