paragonimiasis

paragonimiasis Infection with the trematode (parasitic worm) Paragonimus, most commonly with Paragonimus westermani, the oriental lung fluke. Human infection with P. westermani occurs by eating inadequately cooked or pickled crab or crayfish that harbor the parasite. The parasites penetrate through the intestinal wall into the peritoneal cavity, then through the abdominal wall and diaphragm into the lungs, where they become encapsulated and develop into adults. The worms can also reach other organs and tissues, such as the brain and muscles. Extrapulmonary locations of the adult worms result in more severe manifestations, especially when the brain is involved. Treatment with Praziquantel cures the majority of lung infections.