Module 2 - Flagellates

• Pear-shaped in anteroposterior

• Spoon-shaped in Lateral view

Giardia lamblia

Shape:

12-15 μm long

Giardia lamblia

Size:

Slow, tumbling or falling leaf motion in various directions but without much progression

Giardia lamblia

Motility:

Nuclei, parallel axostyles and tail

Giardia lamblia

Structure:

Cone-shaped

Chilomastix mesnili

Shape:

12-15 μm long

Chilomastix mesnili

Size:

Boring progressive motion with slow rotation of the body

Chilomastix mesnili

Motility:

Spiral groove (diagnostic)

Chilomastix mesnili

Structure:

Ovoid

Trichomonas hominis

Shape:

usually < 10

Trichomonas hominis

Size:

Appears nervous: Moves with rapidly quick jerks

Trichomonas hominis

Motility:

Lashing flagella and Undulating membrane (diagnostic)

Trichomonas hominis

Structure:

Football-shaped (round when standing on end)

Giardia lamblia (cysts)

Shape:

Narrow, clear space between cyst wall and cytoplasm

Giardia lamblia (cysts)

Structure:

Lemon-shaped with nipple-like thickening of wall at narrow end

Chilomastix mesnili (cysts)

Shape:

Cytoplasm dense, no trace of nucleus or flagella seen

Chilomastix mesnili (cysts)

Structure:

No cysts

Trichomonas hominis (cysts)

Shape:

No cysts

Trichomonas hominis (cysts)

Structure: