Paragonimus siamensis: subcutaneous infection with ex-cysted metacercariae

Metacercariae of the lung fluke Paragonimus siamensis were still infective after excysting, and worms could therefore develop to adults in the rats infected subcutaneously with these metacercariae. Cysts containing adult worms were found both inside and outside the lung, those from extrapulmonary cysts being larger.