Ascaris lumbricoidesAscarisAscariasisTrichurisHelminthiasisIntestinal Diseases, ParasiticTrichuriasisAncylostomatoideaHelminthsHookworm InfectionsAnthelminticsParasite Egg CountMebendazoleAlbendazolePrevalenceAntinematodal AgentsAscaris suumProtozoan InfectionsFecesNecator americanusNematode InfectionsPyrantel PamoateToilet FacilitiesSoilEcuadorAntigens, HelminthThiabendazoleParasitic DiseasesAntibodies, HelminthAncylostomaNematodaNecatoriasisLevamisoleSanitationHelminth ProteinsStrongyloides stercoralisParasitologyToxocaraParasitesHygieneAncylostomiasisDNA, HelminthRural HealthStrongyloidiasisGiardiasisBrazilCross-Sectional StudiesSchistosomiasisRural PopulationEthiopiaGiardia lambliaKenyaCameroonImmunoglobulin ECoinfectionPanama