The aetiological agent is a Flavivirus genetically belonging to the tickborne group that is very closely related to Kyasanur forest disease virus , a severe tick-borne hemorrhagic disease reported in India (Karnataka state).
Etiološki dejavnik je Flavivirus , ki gensko pripada skupini klopov, ki so zelo tesno povezani z virusom bolezni gozda Kyasanur , hudo hemoragično boleznijo, ki jo prenašajo klopi in o kateri so poročali v Indiji (država Karnataka).