Schistosoma mansoniDisease VectorsMolluscacidesSchistosomiasis mansoniEchinostomaSnailsHost-Parasite InteractionsHemocytesHemolymphCercariaSchistosomiasisBulinusEuphorbiaPopulation DensityBrazilSchistosomaNiclosamideSilver StainingLatexOocystsEgyptBiological PhenomenaGuadeloupeCompetitive BehaviorAngiostrongylusLakesSaint LuciaEchinostomiasisPest Control, BiologicalLethal Dose 50ArgentinaPiperaceaeDNA, HelminthFresh WaterDalbergiaParasite Egg CountPest ControlSchistosomicidesMartiniqueTilapiaCubaRandom Amplified Polymorphic DNA TechniqueDNA, Ribosomal SpacerPlant ExtractsEcologyPolymorphism, Restriction Fragment LengthSchistosoma haematobiumLarvaSpecies SpecificityPolymerase Chain ReactionDisease ReservoirsSeasonsPredatory BehaviorGenetic MarkersGenetic VariationEnvironmentBiomphalariaPhylogenyMolecular Sequence DataReproductionWaterImmunity, InnateDNA, RibosomalDNA, MitochondrialElectrophoresis, Polyacrylamide GelTime FactorsAmino Acid SequenceBase Sequence