NOTE: N. Fowleri causes Primary Amoebic Meningoencephalitis (PAM) acquired while swimming in contaminated water (nasal cavity, CNS/brain, rapid tissue destruction,
death in 3-6 days, lab ID w/ spinal fluid and nasal damage), Other notes: No fibrils, NP = nonpathogenic, TROPH = trophozoite, All intestinal EXCEPT N. fowleri
Amoeba Notes Nuclei Shape, Size Karyosome Periph.Chromatin Chromatin Bar Inclusions Motility
Entamoeba -Malaria 1-4 Round, 10um Central Even Rounded end,
histolytica CYST -Schistosomiasis rarely seen
Entamoeba -Amoebic Blob, 18um Central Even RBCs (diagnostic) Progressive
histolytica TROPH dysentery directional
E. dispar, NP Identical to E. histo None (differentiates)
Entamoeba NP, “look-alike” to 1-4 Round, 8um Central Even Rounded ends
hartmanii CYST E. histolytica
Entamoeba NP, “look-alike” to
hartmanii TROPH E. histolytica
Entamoeba coli NP 1-32 Round, 18um Eccentric Blotchy, uneven, Splintered ends
CYST thick, rarely seen
Entamoeba coli NP 1 Blob, 22um Eccentric Blotchy, uneven Yeast, bacteria
TROPH
Endolimax nana NP, nana means 1-4 Oval, 8um Blot-like None
CYST small (thick)
Endolimax nana NP, rarely seen, 1 Blob, 8um Blot-like None
TROPH (thick)
Iodamoeba butschlii NP 1, Round, 12um Large, Large glycogen
CYST large irregular vacuole (KEY)
Iodamoeba butschlii NP Blob, 12um Large, Heavily vacuolated Sluggish
TROPH irregular
Blastocytosis Ring of cytoplasm 1-4 Large, central
homins 10% of cell, NP? in ring vacuole, fluid-filled
Naegleria fowleri Stage 1, 5-32um, Large None Slug-like pseudopods
TROPH free living Avg 7-10um
Naegleria fowleri Stage 2, Large Two flagella on broad
FLAGELLATE invasive form end, jerky, spinning
Naegleria fowleri Stage 3, does not
CYST occur in humans
death in 3-6 days, lab ID w/ spinal fluid and nasal damage), Other notes: No fibrils, NP = nonpathogenic, TROPH = trophozoite, All intestinal EXCEPT N. fowleri
Amoeba Notes Nuclei Shape, Size Karyosome Periph.Chromatin Chromatin Bar Inclusions Motility
Entamoeba -Malaria 1-4 Round, 10um Central Even Rounded end,
histolytica CYST -Schistosomiasis rarely seen
Entamoeba -Amoebic Blob, 18um Central Even RBCs (diagnostic) Progressive
histolytica TROPH dysentery directional
E. dispar, NP Identical to E. histo None (differentiates)
Entamoeba NP, “look-alike” to 1-4 Round, 8um Central Even Rounded ends
hartmanii CYST E. histolytica
Entamoeba NP, “look-alike” to
hartmanii TROPH E. histolytica
Entamoeba coli NP 1-32 Round, 18um Eccentric Blotchy, uneven, Splintered ends
CYST thick, rarely seen
Entamoeba coli NP 1 Blob, 22um Eccentric Blotchy, uneven Yeast, bacteria
TROPH
Endolimax nana NP, nana means 1-4 Oval, 8um Blot-like None
CYST small (thick)
Endolimax nana NP, rarely seen, 1 Blob, 8um Blot-like None
TROPH (thick)
Iodamoeba butschlii NP 1, Round, 12um Large, Large glycogen
CYST large irregular vacuole (KEY)
Iodamoeba butschlii NP Blob, 12um Large, Heavily vacuolated Sluggish
TROPH irregular
Blastocytosis Ring of cytoplasm 1-4 Large, central
homins 10% of cell, NP? in ring vacuole, fluid-filled
Naegleria fowleri Stage 1, 5-32um, Large None Slug-like pseudopods
TROPH free living Avg 7-10um
Naegleria fowleri Stage 2, Large Two flagella on broad
FLAGELLATE invasive form end, jerky, spinning
Naegleria fowleri Stage 3, does not
CYST occur in humans
