Infection with trematoda of the genus paragonimus.

Paragonimiasis is a food-borne parasitic disease caused by several species of lung flukes belonging to genus Paragonimus. Infection is acquired by eating crustaceans such as crabs and crayfishes which host the infective forms called metacercariae, or by eating raw or undercooked meat of mammals harboring the metacercariae from crustaceans. More than 40 species of Paragonimus have been identified; 10 of these are known to cause disease in humans...