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Entamoeba histolytica/Entamoeba dispar trophozoites stained with trichrome. Entamoeba histolytica/Entamoeba dispar trophozoites have a single nucleus, which have a centrally placed karyosome and uniformly distributed peripheral chromatin. This typical appearance of the nucleus is not always observed as some trophozoites can have nuclei with an ...
Entamoeba histolytica is an anaerobic parasitic amoebozoan, part of the genus Entamoeba. [1] Predominantly infecting humans and other primates causing amoebiasis, E. histolytica is estimated to infect about 35-50 million people worldwide. [1] E. histolytica infection is estimated to kill more than 55,000 people each year. [2]
- E. histolytica
- Entamoeba
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Feb 13, 2017 · Entamoeba histolytica occurs in the following forms, the trophozoites, precyst, cyst, metacyst, and metacystic trophozoite. The trophozoite is about 10–60 μm in size with a clear finely granular cytoplasm and a spherical nucleus that shows aggregation of chromatin beads at the nuclear membrane and a centrally located karyosome.
- Nadia A. El-Dib
- naeldib@hotmail.com
- 2017
Dec 23, 2016 · Cyst stage (10–15 μm) Minuta and magna stages are characterized by a hyaline ectoplasm, a single hernia sack-like protruding pseudopodium at the anterior pole of the cell and as seen in colored specimens by their typical nucleus and by condensation of the chromatin at the inner side of the inner nuclear membrane (Figs. 2, 3, and 4).
- Heinz Mehlhorn
- mehlhorn@uni-duesseldorf.de
Entamoeba histolytica occurs in the following forms, the tro-phozoites,precyst,cyst,metacyst,andmetacystictrophozoite. The trophozoite is about 10–60 μm in size with a clear finely granular cytoplasm and a spherical nucleus that shows aggre-gation of chromatin beads at the nuclear membrane and a centrally located karyosome.
- Nadia A. El-Dib
- 2017
Feb 9, 2024 · Precyst. It is the intermediate stage that exist between trophozoite and cyst. It is smaller in size; 10-20µ. It is slightly ovoid and round with blunt pseudopodium projecting from periphery. No food material or RBC are found on its endoplasm.
Jun 3, 2020 · The life cycle of Entamoeba histolytica is relatively simple, consisting of two stages: the dormant cyst and the vegetative trophozoite . Transmission of amoebiasis begins with the ingestion of mature quadrinucleated E. histolytica cysts found in fecal-contaminated food or water ( 40 , 133 ).
