Polio (Poliomyelitis) | what caused polio
SkiptocontentCedars-SinaiHealthLibraryPolio(Poliomyelitis)ShareEmailPrintConditions&TreatmentsSymptomCheckerVideoLibraryPreventionGuidelinesHealthCalculatorsRiskAssessmentsPolio(Poliomyelitis)Notwhatyou'relookingfor?StartNewSearchABOUTCAUSESDIAGNOSISTREATMENTNEXTSTEPSWhatispolio?Poliomyelitisiscommonlycalledpolio.Itisaninfectiousdisease.Itiscausedby1of3typesofpoliovirus.Polioiseasilyspreadfrompersontoperson.Thepoliovirusisavirusthatcancauseparalysis.Butmostpeoplewhoareinfectedwithpoliohavenosymptoms,andafewhavemildsymptoms.Veryfewpeoplewhogetpoliodevelopparalysis.Sincethepoliovaccinewasinventedin1955,poliohasbeennearlystampedout.IntheU.S.,therehavebeennoknowncasesofpoliosince1979.Pooranddevelopingcountriesmaynothaveaccesstothevaccine.Polioisstillaconcernintheseareas,especiallyforinfantsandchildren.Whatcausespolio?Polioiscausedby1of3typesofthepoliovirus.Itoftenspreadsduetocontactwithinfectedfeces.Thisoftenhappensfrompoorhandwashing.Itcanalsohappenfromeatingordrinkingcontaminatedfoodorwater.Itcanalsobespreadwhenaninfectedpersoncoughsorsneezesinfecteddropletsintotheair.Thosewiththeviruscanexcretethevirusintheirstoolforseveralweeks.Peoplearemostcontagiousrightbeforesymptomsstartandsoonaftertheyappear.Whatarethesymptomsofpolio?Symptomsofpoliovaryintheirseverity.Mostaffectedpeoplehavenosymptomsatall.Thisiscalledaninapparentinfection.Theothertypesofpolioareabortive,nonparalytic,andparalytic.Thefollowingarethemostcommonsymptomsofpolio.Buteachpersonmayhavedifferentsymptoms.AbortivepolioAbortivepolioisamildandshortcourseofthediseasewith1ormoreofthesesymptoms:FeverDecreasedappetiteNauseaand/orvomitingSorethroatNotfeelingwellallover(malaise)ConstipationAbdominalpainNonparalyticpolioThesymptomsfornonparalyticpolioarelikeabortivepolio.Theinfectedpersonmayfeelsickforacoupleofdays.Then,theymayseemtoimprovebeforegettingsickagainwiththesesymptoms:Painofthemusclesintheneck,trunk,arms,andlegsStiffnessintheneckandalongthespineParalyticpolioThesymptomsforparalyticpolioareliketheother2typ
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