Echinostomiasis - Echinostoma Life Cycle

1) Unembroynated eggs passed in feces

2) Embryonated eggs in water

3) Miracidia hatch from eggs, seek out snail host

4) Miracidum penetrates snail host

5) Free-swimming cercariae invade second intermediate host.

6) Metacercariae in second intermediate host ingested by definitive host.

7) Excyst in duodenum

8) Adult in small intestine



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