BrazilPediculusScalp DermatosesEmollientsCosmeticsAcne VulgarisElectrolysisMalathionRosaceaOintmentsAdministration, TopicalSkin CreamDimethylpolysiloxanesDermatitis, SeborrheicScabiesSoapsLindaneInsect RepellentsIvermectinHyperpigmentationSunscreening AgentsInsecticidesSkin AbsorptionChemistry, PharmaceuticalClindamycinNeomycinSkinSalicylic AcidAluminumFresh WaterSingle-Blind MethodDrug CombinationsPopulation DensityRiversSeasonsCryopreservationPsychodidaePrevalenceInsect VectorsTreesIndians, South AmericanTreatment OutcomeSocioeconomic FactorsCross-Sectional StudiesUrban PopulationEndemic DiseasesBertholletiaFishesEpidemiologic MethodsPhylogenyInfant, NewbornFecesPopulation DynamicsSimuliidae