[Omsk hemorrhagic fever--current status of the problem]. / Omskaia gemorragicheskaia likhoradka, sovremennoe sostoianie problemy.

The author sums up the data on the history of discovery and research of Omsk hemorrhagic fever (OHF), comparative characteristics of its natural foci, and clinical features of epizootic and epidemic processes at the end of the 1940s and at present. Presents the modern concept of OHF virus ecology and discusses differences of its biological properties in the strains isolated from different sources. Based on analysis of many-year findings and major publications, the author offers a long-term epizootological and epidemic prognosis for OHF in endemic territories.

[Regional epidemiologic characteristics of combined foci of tick-borne encephalitis, endemic rickettsioses and leptospirosis in Western Siberia]. / Landshaftno-épidemiologicheskaia kharakteristika sochetannykh ochagov kleshchevogo éntsefalita, éndemicheskikh rikketsiozov i leptospirozov v Zapadnoi Sibiri.

The authors carried out complex study of combined foci of infections with natural foci in Western Siberia and their reflection in human pathology. The results of serological examination of 5917 persons and of 1743 of farm animals in respect to tick-borne encephalitis, Asian tick-borne rickettsiosis, Q-rickettsiosis, and leptospiroses are analysed. Affection of the population with all the four infections in all the landscape zones under study was shown; the intensity of this affection with different infections differed. Combined natural foci of the mentioned infections were found to be widespread; epidemiological significance of such combination was unequal in different ladscapes, this depending on the ladscape characteristics of the natural foci of infections under study and of different ways of transmission of their causative agents.