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

LIFE CYCLE

• Unembryonated egg passed in faeces of the host .Under favourable condition the infective stage(L1) is reached in about a weeks (infective stage is L1).
• The D/H acquires infection by ingestion of embryonated egg containing L1.
• The eggs are hatched in the small intestine, the liberated L1 penetrate the intestinal mucosa, where all the moulting occurs .
• The adult worms reenter into the lumen and moves to the caecum. In the caecum the filamentous anterior end embedded in the caecal mucosa.