Parvatrema timondavidi (Digenea; Gymnophallidae) transmitted by a clam, Tapes philippinarum, in Korea.
Metacercariae of Parvatrema timondavidi were found in Tapes philippinarum, one of the most common marine clams in Korea. T. philippinarum was collected from a fish market in Seoul, and all of the clams examined were found to contain many gymnophallid metacercariae. To obtain adult worms, 10 ICR mice were fed with 100 metacercariae each and sacrificed by cervical dislocation at 7, 10 and 14 days pi. The adult worms collected from the intestinal contents of the mice were characterized morphologically by oval body shape, large oral sucker with lateral projections on the lip, absence of a ventral pit, single cluster of vitellaria and a genital pore located separately from the ventral sucker. Based on these characters the worms were identified as P. timondavidi. This study confirmed for the first time the presence of P. timondavidi metacercariae in T. philippinarum in Korea.