Lung flukes

Lung flukes: there are ten species of lung flukes that infect humans, causing paragonimiasis. Of these, the most common cause of human paragonimiasis is Paragonimus westermani, the oriental lung fluke. Lung flukes require three different hosts in order to complete their life cycle. The first intermediate host is a snail, the second intermediate host is a crab or crayfish, and the definitive host for