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

LIFE CYCLE

• Eggs are passed out in the urine of the host.
• At 26^oC, eggs hatch after 24-36 h and larvae reach infective stage in four days.
• Infection of the host occurs per os or through skin. Earthworms may act as transport host.
• Larvae undergo ecdysis either in the wall of the stomach after oral infection or in the skin and abdominal muscles after percutaneous infection.
• Larvae then enter the liver and then reaches the peritoneal cavity.
• Then the reach the perirenal tissues and perforate the walls of ureters and produce cyst.
• Migratory larvae can also go to lungs, spleen and psoas muscles.