SnailsBiomphalariaSchistosoma mansoniDisease VectorsLymnaeaFresh WaterMolluscacidesBulinusEchinostomaCercariaHost-Parasite InteractionsAnimal ShellsSchistosomiasis mansoniEgyptMartiniqueGuadeloupeSchistosomaTrematodaSaint LuciaPopulation DensityHemocytesHemolymphInvertebrate HormonesBrazilSchistosomiasisHelix (Snails)EuphorbiaNiclosamideSilver StainingLatexOocystsCompetitive BehaviorLethal Dose 50AngiostrongylusBiological PhenomenaTilapiaConus SnailDNA, HelminthEchinostomiasisLakesArgentinaPhylogenyPest Control, BiologicalGillsLarva MigransPalaemonidaeParasite Egg CountPiperaceaePest ControlDalbergiaEcologySeawaterFishesMolecular Sequence DataRiversDNA, Ribosomal SpacerSpecies SpecificitySchistosomicidesEcosystemPredatory BehaviorFreshwater BiologyRandom Amplified Polymorphic DNA TechniqueCubaDNA, RibosomalPlant ExtractsLarvaWater MicrobiologySchistosoma haematobiumSeasonsPlanktonEnvironmentFish DiseasesTrematode InfectionsPolymerase Chain ReactionPolymorphism, Restriction Fragment LengthSalinityGastropodaAquacultureGenetic Variation