Potential medications for eliminating a blastocystis infection and improving symptoms include: Antibiotics, such as metronidazole (Flagyl) or ...Currentpatientvaccinationupdatesbycampus:ArizonapatientvaccinationupdatesArizona,FloridapatientvaccinationupdatesFlorida,RochesterpatientvaccinationupdatesRochester,MayoClinicHealthSystempatientvaccinationupdatesMCHSViewMayoClinicsafecareandvisitorguidelines,plustrustedcoronavirusinformationMayoClinicfactsaboutcoronavirusdisease2019(COVID-19)Learnmore​​SkiptositenavigationSkiptoContentThiscontentdoesnothaveanEnglishversion.ThiscontentdoesnothaveanArabicversion.SectionsforBlastocystishominisSymptoms&causesDiagnosis&treatmentPrintDiagnosisIfyouhavediarrheaandrelatedsymptoms,thecausemaybedifficulttodiagnose.Evenifblastocystisisfoundinyourstool,itmightnotbecausingyoursymptoms.Oftenanotherfood-orwater-borneorganismisthelikelycauseofillness.Yourdoctorwilltakeyourmedicalhistory,askyouaboutrecentactivities,suchastraveling,andperformaphysicalexam.Anumberoflabtestshelpdiagnoseparasiticdiseasesandothernoninfectiouscausesofgastrointestinalsymptoms:Stool(fecal)exam.Thistestlooksforparasites.Yourdoctormightgiveyouacontainerwithpreservativefluidforyourstoolsample.Refrigerate—don'tfreeze—yoursamplesuntilyoutakethemtoyourdoctor'sofficeorlab.Endoscopy.Ifyouhavesymptoms,butthefecalexamdoesn'trevealthecause,yourdoctormightrequestthistest.Whenyou'reundersedation,aspecialcameraonatubeisusedtoexamyourdigestivetract.Bloodtests.Abloodtestthatcandetectblastocystisisavailablebutnotcommonlyused.However,yourdoctormightorderbloodteststolookforothercausesofyoursignsandsymptoms.MoreInformationCTscanMRIUpperendoscopyX-rayShowmorerelatedinformationTreatmentIfyouhaveablastocystisinfectionwithoutsignsorsymptoms,thenyoudon'tneedtreatment.Mildsignsandsymptomsmightimproveontheirownwithinafewdays.Potentialmedicationsforeliminatingablastocystisinfectionandimprovingsymptomsinclude:Antibiotics,suchasmetronidazole(Flagyl)ortinidazole(Tindamax)Combinationmedications,s