SnailsBiomphalariaSchistosoma mansoniDisease VectorsHost-Parasite InteractionsLymnaeaMolluscacidesFresh WaterEchinostomaSchistosomiasis mansoniBulinusCercariaAnimal ShellsEgyptHemocytesMartiniqueGuadeloupeSchistosomaTrematodaSaint LuciaHemolymphPopulation DensityBrazilOocystsParaguayArgentinaInvertebrate HormonesSchistosomiasisHelix (Snails)RiversEuphorbiaNiclosamideSilver StainingLatexCompetitive BehaviorBiological PhenomenaConus SnailLethal Dose 50TilapiaEchinostomiasisAngiostrongylusDNA, HelminthLakesPest Control, BiologicalPolymerase Chain ReactionGillsPhylogenyPalaemonidaePiperaceaeBreedingParasite Egg CountDalbergiaPest ControlEcologyDNA, Ribosomal SpacerSeawaterSchistosomicidesFishesFreshwater BiologyMolecular Sequence DataCubaSpecies SpecificityRandom Amplified Polymorphic DNA TechniqueTime FactorsLarvaDNA, RibosomalEcosystemPlant ExtractsSchistosoma haematobiumWater MicrobiologyPredatory BehaviorPlanktonPolymorphism, Restriction Fragment LengthTrematode InfectionsEnvironmentSeasons