TROPHOZOITE
SIZE: 10 to 50 mcm.
SHAPE : Irregular.
NUCLEUS: Vesicular, dispersed.
NUMBER: One.
PERIPHERAL CHROMATIN: Course granules; irregular size and distribution
KARYOSOME: Small but larger than e. histolytica and usually eccentric.
NUCUEOPLASM: Not as clean as E. histolytica.
CYTOPLASM:
APPEARANCE: Dirty, vaculoated, coarsely granular.
INCLUSIONS: Yeasts, molds, bacteria.
MOBILITY: Nondirectional with blunt pseudopodia.
Figure 1-8. Trophozoites, E. coli.
CYST
SIZE: 10 to 35 mcm.
SHAPE : Spherical.
NUCLEUS: Vesicular, dispersed.
NUMBER: 1-8; mature cyst has 8.
PERIPHERAL CHROMATIN: Course granules; irregular size and distribution
KARYOSOME: Small but larger than e. histolytica and usually eccentric.
NUCUEOPLASM: Not as clean as E. histolytica.
CYTOPLASM: Dirty.
CHROMATOID BODIES: Splintered-ends; uneven; pointed ends; resembles shock of
wheat.
GLYCOGEN: Diffused.
Figure 1-9. Cysts, E. Coli.
MD0842
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