How can a person become infected with a hepatic trematode?

1) hepatic trematode cysts are on the surface of herbaceous plants growing near water bodies; hepatic fluke larvae live in a pond;
2) a person can take a blade of grass in his mouth with a cyst on it, and which with saliva can enter the human body.
3) During bathing, a person can accidentally swallow water with the larvae of the hepatic fluke that are in it.

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