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

LIFE CYCLE

• Eggs are passed in the faeces of host, they hatch in the water and liberate L1.
• These L1 swim in water for few days and then shoud be ingested by the cyclops.
• In the haemocoel cavity of cyclops L1 develops to L2.
• When infected cyclops is ingested by fresh water fish, the L2 moult to becomeL3 in the body cavity of fish.
• The L3 encyst on various muscles of fish.
• D/H acquire infection by ingestion of infected fresh water fish.
• Man acquires infection by ingestion of under cooked infected fish.