TrematodaTrematode InfectionsSnailsSchistosoma mansoniBiomphalariaHost-Parasite InteractionsParasitesHeterophyidaeEchinostomaParamphistomatidaeHelminthiasis, AnimalFasciola hepaticaFood ParasitologyEchinostomiasisHelminthsOpisthorchisMetacercariaeIntestinal Diseases, ParasiticFish DiseasesParagonimus westermaniParasitic Diseases, AnimalLaosCestodaParasite LoadParasite Egg CountPlasmodium falciparumDNA, HelminthEchinostomatidaeLife Cycle StagesFasciolidaeProtozoan ProteinsCardiidaeAcanthocephalaHelminth ProteinsFasciolaFascioliasisAntiplatyhelmintic AgentsOpisthorchiasisAquacultureBulinusCestode InfectionsCercariaParasitic DiseasesClonorchis sinensisProtozoan InfectionsSchistosoma