Taxonomical and Ecological Studies on the Lung Fluke, 'Paragonimus' in the Pacific Area, with Special Reference to South-East Asia.

In Peru, two adult lung flukes were obtained from a 36-year-old Peruvian male, who had never been outside Peru and was suspected to have become infected near Aguaytia, a small town in Amazon area. The worms did not show their normal morphology due to bithionol. In Tingo Maria, about 60 kilometers from Aguaytia, an undescribed metacercaria of Paragonimus was found from one of 13 crabs, Pseudothelphusa chilensis collected in the university campus, and two persons living in the campus were positive for skin test, but negative for eggs. In Cajamarca northern part of Peru, P.caliensis was first recognized as the second lung fluke in this country. In Achiote, Colon Province, Panama, six of nine crabs, Pseudothelphusa richmondi were proved to be infected with Paragonimus metacercariae, which were separated into two species by their characteristics. The first species was identified as P.peruvianus, and the second one was presumed to belong to P.mexicanus. Author