An encysted cercaria. If present in fluke life history, it is ingested passively by the final host.
A mature form of the cercaria larva of a fluke. Liver fluke metacercariae are enveloped by thin cysts and develop on various kinds of vegetation.
The encysted stage in the life of a trematode. This stage occurs in an intermediate host prior to transfer to the definitive host.
The encapsulated phase of a fluke larva that induces infection in humans.