CestodaTrematodaCestode InfectionsTrematode InfectionsPlatyhelminthsDiphyllobothriasisEchinostomiasisHeterophyidaeDiphyllobothriumEchinostomaHymenolepisSchistosomatidaeCercariaHelminthiasis, AnimalPaleopathologyFasciola hepaticaSnailsLymnaeaFish DiseasesDNA, HelminthHost-Parasite InteractionsOpisthorchis