Taxonomy: f. Entamoebidae
Animal: Entamoeba coli 1 14.jpg
Entamoeba histolytica and Entamoeba coli. Entamoeba histolytica cyst - spherical 10 - 20 microns (average 12 - 15). Mature cyst has 4 nuclei - fine peripheral chromatin, small compact central karyosome and may have elongate chromatoidal bodies which have blunt or rounded smooth edges. Entamoeba coli cyst 10 - 33 microns 1 to 8 nuclei with coarse peripheral chromatin and a coarse eccentric karyosome in a faecal smear stained with Iodine. Harmless commensal.
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