Parasitology Training Manual

Fasciola hepatica



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F. hepatica wet mount F. hepatica Life Cycle


Fasciola hepatica Life Cycle

Adults inhabit the biliary tree. Eggs are released and are passed with feces. Under optimal conditions the eggs hatch in 1 - 2 weeks. The miracidium released must enter a suitable snail or it will die in a very short time. Once inside the shell it metamorphoses into various stages. First a sporocyst, rediae, finally a cercariae. The cercariae leave the snail and encyst on various plants or soil near the waters surface. When these metacercariae are ingested by a suitable host they pass through the intestinal wall, migrate to the liver and on to the biliary tree, damaging liver tissue enroute.

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