ClonorchiasisClonorchis sinensisChinaHeterophyidaePraziquantelAntiplatyhelmintic AgentsParagonimusParasite Egg CountMetacercariaeTrematode InfectionsFood ParasitologyKoreaAnthelminticsAntigens, HelminthAntibodies, HelminthParasitic DiseasesBile Ducts, IntrahepaticEndemic DiseasesBile DuctsShellfishCholangiographyRiversFisheries