Cyst of Entamoeba coli stained with iodine from and infected olive baboon. Mature cysts can have up to 8 nucleii.
Entamoeba histolytica/dispar cysts stained with iodine from and infected olive baboon. Mature cysts are spherical, have 4 nucleii, and measure 12 to 18 µm in diameter.
Entamoeba invadens trophozoite from tissue of a tortoise. An important pathogen of captive reptiles, E. invadens is the causative agent of amoebiasis in reptiles. Trophozoites measure 10-38 μm by 9-30 μm with one to four nuclei.
Lesion of Entamoeba invadens in the stomach of a tortoise. Lesions typically occur in the intestinal tract and liver, creating ulcers characterized by hyperaemia, inflammation, and an infiltration of neutrophils. Amoebae are found at the periphery of the ulcer, leaving the cavity filled with necrotic tissue
Feeding trophozoites in a section of brain tissue. Naegleria fowleri has be indicated at the cause of primary amoebic meningoencephalitis (PAM) in man.