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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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Jan 1, 2008 · E. coli is Gram-negative and its envelope has three layers: cytoplasmic membrane, peptidoglycan, and outer membrane. The peptidoglycan is rigid determining the rod shape. To a good approximation, the E. coli cell has hemispherical caps and a cylindrical section in between.
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. The core of the trophozoite is slightly oval in shape with a nucleus surrounded by a thick membrane.
- Akhlema Haidar, Orlando De Jesus
- 2023/02/12
Structure. The trophozoite is 10 to 60 µm in diameter, ameboid, actively motile, and often erythrophagocytic. In stained specimens, the nucleus has a central karyosome with finely beaded peripheral chromatin. The cyst form is rounded, 10 to 20 µm in diameter, with one to four nuclei showing the characteristic appearance.
- Jr William A. Sodeman
- 1996
E. coli has "three distinct morphological forms exist airing the life cycle-Trophozoite, Pre-cystic stage and Cystic stage". This lifecycle gives rise to the general way of how Entamoeba species form. This parasite has one large nucleus with a thick membrane surrounding the nucleus.
- E. coli
- Entamoeba
Entamoeba coli Entamoeba coli trophozoite E. coli trophozoite E. coli cyst E. coli cyst (iodine) a. Morphology - trophozoites range from 10 to 35 microns in diameter; cysts range from 10 to 30 microns in diameter and contain 8 to 16 nuclei when mature; the nucleus exhibits an eccentric karyosome with irregular, coarse chromatin.
Trophozoites of E. coli measure 15–50 μm and have a single nucleus with irregular peripheral chromatin and a usually eccentric karyosome. The cytoplasm is often described as “dirty” and may contain vacuoles and ingested food particles, including bacteria, yeast, and even other intestinal protozoa. Cysts are 10–35 μm in diameter.
E. coli trophozoites stained with trichrome. Trophozoites of Entamoeba coli usually measure 15–50 µm. The trophozoites have a single nucleus with a characteristically large, eccentric karyosome and coarse, irregular peripheral chromatin.
