What Causes Lung Fluke?

What Causes Lung Fluke? Paragonimiasis is caused by infection with a flatworm. That’s a parasitic worm How do you get lung flukes? People get lung fluke infections when they swallow cysts containing immature flukes (larvae) in raw, undercooked, or pickled freshwater crabs or crayfish. These infections occur most often in Asia. Is lung fluke common?