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- In the binucleate state, the glycogen vacuole is formed. The most distinguishing feature of the Entamoeba coli is the eight-core nuclei, which develops as the cyst begins to mature. In the octonucleate cystic form, the glycogen vacuole is reabsorbed. Occasionally, the nuclei may replicate until it has 16 nuclei in total.
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Aug 23, 2023 · On initial microscopy, the cyst of Entamoeba coli typically has eight nuclei, while Entamoeba histolytica typically has four. The peripheral chromatin is coarse and irregularly clumped for Entamoeba coli and fine, evenly distributed for Entamoeba histolytica .
- Akhlema Haidar, Orlando De Jesus
- 2023/02/12
Mature cysts typically have 8 nuclei but may have as many as 16 or more. Entamoeba coli is the only Entamoeba species found in humans that has more than four nuclei in the cyst stage. The nuclei may be seen in unstained as well as stained specimens.
Entamoeba coli cyst with more than 4 nuclei. The presence of E.coli is not cause in and of itself to seek treatment as it is considered harmless. However, when a person becomes infected with this benign entamoeba, other pathogenic organisms may have been introduced as well, and these other pathogens might cause infection or illness.
- E. coli
- Entamoeba
The Entamoeba coli cyst typically has two to four times more nuclei than cysts in E. histolytica. The Entamoeba coli cyst has been reported to become more refractive during fixation so that it often is visualized better in a wet preparation. 4. Generally, Entamoeba coli still is regarded by most investigators as a commensal organism.
Mature cysts typically have 8 nuclei but may have as many as 16 or more. Entamoeba coli is the only species in the genus encountered in humans with more than four nuclei in the cyst stage. The nuclei may be seen in unstained as well as stained specimens.
Entamoeba caviae resembles Entamoeba coli from man ( Fig. 32 ). The trophozoites are 10.5–20.0 μm (14.4 μm) in diameter with an eccentric or central nucleolus. The ectoplasm and endoplasm are not clearly differentiated. Although Nie (1950) observed no cysts, both Holmes (1923) and Faust (1950) did. Cysts are rarely found.
The mature cysts ( Figure 262-3) are ovoid to round in shape (similar in size to trophozoites), contain 4 nuclei, and also can have small, slightly curved chromatoid rods and glycogen vacuoles. Immature cysts containing 2 nuclei rarely are seen in stool specimens. View chapter Explore book. Infections Caused by Parasites. Audrey Wanger, ...
