TROPHOZOITE
SIZE: 6 to24 mcm.
SHAPE : Pyriform; asymmetrical; with a longitudinal spiral torsion.
NUCLEUS: One; relatively big; large nucleus to cytoplasm ratio; usually found at the
anterior portion of the organism, by the cystoplasmic membraine.
CYTOPLASM:
FLAGELLA:
EXTERNAL: three; anterior.
INTERNAL: One; cytostomal.
KINETOSOMES: Anterior; connected by microfibrils.
CYTOSTOMAL GROOVE: Prominent; near the anterior end; hour-glass shape.
CYTOSTOMAL FIBRIL: Support; along each side of the cytostomal groove.
MOBILITY: Stiff and rotary.
Figure 1-24. Trophozoite, C. mesnili.
CYST
SIZE: 6 to10 mcm.
SHAPE : Lemon-shape, ovoid.
NUCLEUS: One.
CYTOPLASM: Remnants of flaagella, kinetosomes, and cytostomal groove (hour-glass
shape); hyaline anterior nipple.
Figure 1-25. Cyst, C. mesnili.
MD0842
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