BrazilPopulation DensitySeasonsRiversPsychodidaePrevalenceTreesInsect VectorsIndians, South AmericanSocioeconomic FactorsEndemic DiseasesCross-Sectional StudiesUrban PopulationBertholletiaEpidemiologic MethodsInfant, NewbornPopulation DynamicsRetrospective StudiesMolecular Sequence DataTime FactorsPhylogenyPolymerase Chain ReactionSimuliidae