This graphic shows the ecological cycle for Omsk hemorrhagic fever virus (OHFV), a member of the virus family Flaviviridae. Cases of OHF ...SkipdirectlytositecontentSkipdirectlytopageoptionsSkipdirectlytoA-ZlinkSkipdirectlytoA-ZlinkSkipdirectlytoA-ZlinkOmskHemorrhagicFever(OHF)SectionNavigationCDCHomeFacebookTwitterLinkedInSyndicateOmskVirusEcologyMinusRelatedPagesThisgraphicshowstheecologicalcycleforOmskhemorrhagicfevervirus(OHFV),amemberofthevirusfamilyFlaviviridae.CasesofOHFoccurinthewesternSiberiaregionsofOmsk,Novosibirsk,KurganandTyumen.RodentsserveastheprimaryhostforOHFV,whichistransmittedviathebiteofaninfectedtick.Likewise,humanscanbecomeillfollowinganinfectedtickbiteorthroughcontactwiththeblood,feces,orurineofaninfected,sick,ordeadanimal–mostcommonly,rodents.Occupationalandrecreationalactivitiessuchashuntingortrappingmayincreasehumanriskofinfection.Nohuman-to-humantransmissionhasbeendocumented.Pagelastreviewed:December9,2013Contentsource:CentersforDiseaseControlandPrevention,NationalCenterforEmergingandZoonoticInfectiousDiseases(NCEZID),DivisionofHigh-ConsequencePathogensandPathology(DHCPP),ViralSpecialPathogensBranch(VSPB)homeOmskHemorrhagicFeverTransmissionSigns&SymptomsRiskofExposureDiagnosisTreatmentPreventionOmskDistributionMapResourcesexpandOmskVirusEcologyRelatedLinksAboutVSPB(ViralSpecialPathogensBranch)FacebookTwitterLinkedInExitNotification/DisclaimerPolicyCloseLinkswiththisiconindicatethatyouareleavingtheCDCwebsite.TheCentersforDiseaseControlandPrevention(CDC)cannotattesttotheaccuracyofanon-federalwebsite.Linkingtoanon-federalwebsitedoesnotconstituteanendorsementbyCDCoranyofitsemployeesofthesponsorsortheinformationandproductspresentedonthewebsite.Youwillbesubjecttothedestinationwebsite'sprivacypolicywhenyoufollowthelink.CDCisnotresponsibleforSection508compliance(accessibility)onotherfederalorprivatewebsite.FormoreinformationonCDC'swebnotificationpolicies,seeWebsiteDisclaimers.CancelContinue