Abstract
The eggs of the trematode pass into water, embryonate and are swallowed by the snail, Goniobasis livescens. They do not hatch in water. In the snail, multiplication through redia and daughter redia stages takes place and cercariae, with long flanged tails and pigmented eyespots, are produced. These escape into the water, but have a free life of less than 48 hours. To survive during this period, they must penetrate the skin of a fish, a great variety of which are successful intermediaries. In the muscle of the fish, the cercaria encysts to become metacercaria, which is however not immediately infective. Infection of the definitive host is by ingestion of the uncooked fish.
Publisher
Canadian Science Publishing
Subject
Pharmacology (medical),Complementary and alternative medicine,Pharmaceutical Science