[The Omsk hemorrhagic fever: research results (1946-2013)]

The main aspects of epidemiology and epizootology of the Omsk hemorrhagic fever (OHF) are analyzed. The discovery of the virus OHF in 1947, as well as the first outbreak of new diseases in the districts of the Omsk region, is described. Comprehensive work for decryption of the etiology of the OHF by specialists from the Omsk and Moscow Institutes is carried out. Long-term dynamics of activity of natural foci of OHF contains four periods of variable intensity of epidemic and epizootic processes. The main reservoir of the virus OHF in natural foci and the source of human infection is muskrat. Metaxenosis provides maintaining of the population of the virus, which is of some significance for hosts. Independent position of the virus OHF in the group of the Flaviviruses of mammals transmitted by ticks is established. There are two aenovariants of the virus OHF.