Object

• larva: It is very difficult to remove encysted larvae with antihelminthics - the aim is to reduce the number of larvae with repeated treatments.

• stage: Young puppies and occasional kittens are often born with these parasites since they can migrate from encysted stages in the mother.

Preposition: on

• vegetation: Metacercaria encyst on vegetation, infection of the definitive host is by ingestion of contaminated vegetation.

Preposition: in

• host: These parasites generally have larval forms encysted in an intermediate host, aiding geographical distribution, as the intermediate host moves around.