PROTOZOA (Intestinal Amoeba) Flashcards
Amoebic dysentery
o Intraintestinal
o Extraintestinal
(liver -> hepatic amoebiasis)
Extraintestinal
Trophozoite
o Cytoplasm
o Nucleus
clear, transparent, and refractile
Outer ectoplasm
finely granular, having a ground glasslike appearance
Inner endoplasm
contains ingested RBC
Endoplasm
spherical in size and contains central karyosome, surrounded by clear halo and anchored to the nuclear membrane by fine radiating fibrils cartwheel appearance
Nucleus
Cyst
o Chromatoidal
o Quadrinucleated
cigar shape
Chromatoidal bodies
Entamoeba histolytica trophozoite Distinguishing features
Uninucleated
Clear cytoplasm (fine granules)
Bull’s eye karyosome
Finger-like pseudopodia
Rapid unidirectional progressive motility
With ingested RBC
Differs in DNA and RNA content
Entamoeba dispar
Amoeba of pigs, Cyst is uninucleated
Entamoeba polecki
Small-reace of amoeba
Entamoeba hartmanni
Closest to E. histolytica in terms of size
E. hartmanni
Closest to E. histolytica in terms of overall appearance including genetic materials
E. dispar
Size (um) 12-60
E. histolytica (TROPHOZOITE)
Size (um) 20-50
E. coli (TROPHOZOITE)
Motility of E. histolytica trophozoite
Unidirectional / Progressive
Motility of E. coli trophozoite
Sluggish non directional
Pseudopodia of E. histolytica trophozoite
Long and finger like