GiardiasisGiardia lambliaMetronidazoleFecesCampingAntiprotozoal AgentsHealth ResortsCryptosporidiosisIntestinal Diseases, ParasiticAntitrichomonal AgentsQuinacrineWater SupplyMalabsorption SyndromesDuodenoscopyAntiparasitic AgentsDiapers, InfantTrophozoitesTinidazoleParasitologyDelayed DiagnosisJejunumMandatory ReportingDiarrheapara-AminobenzoatesPopulation SurveillanceSwimming PoolsPrenatal DiagnosisStomach DiseasesEarly Diagnosis