VPA 211: General Veterinary Parasitology and Helminthology (3+1)

MIRACIDIUM

• Roughly triangular in shape.
• Anterior end is broad and has a spine.
• Body is covered with ciliated ectoderm.
• Miracidum usually provided with excretory and nervous system, sac like intestine and eyespots.
• Number of germ cells attached to the wall of the body.
• It does not feed, further development occurs only after entering into the snail I/H.
• Penetration into the snail I/H is assisted by boring action of miracidium and enzyme secreted by apical glands and penetration glands.
• After entering into the snail I/H  its ciliated covering is lost and becomes sporocyst.

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