kemerovo tickborne viral fever kemerovo tickborne viral fever kemerovo tickborne viral fever is an aparalytic febrile illness accompanied by meningism following tick-bite. the causative agent is a zoonotic orbivirus first described in 1963 in western siberia by mikhail chumakov and coworkers. the virus has some 23 serotypes, and can occur in coinfections with other orbiviruses and tick-transmitted encephalitis viruses, complicating the course of illness. rodents and birds are the primary vertebrate hosts of the virus; ixodes persulcatus ticks are a vector of the virus. kemerovo and related viruses may be translocated distances in the environment by migratory birds. kemerovo virus virus classification (unranked): virus realm: riboviria kingdom: orthornavirae phylum: duplornaviricota class: resentoviricetes order: reovirales family: reoviridae genus: orbivirus species: great island virus virus: kemerovo virus