[Endemic foci of hemorrhagic fever with renal syndrome in the North-Western region of the European part of the USSR].

For the detection of specific antigens of hemorrhagic fever with renal syndrome (HFRS) virus, examinations were carried out covering 8.061 animals of 23 species trapped in the Murmansk, Archangelsk, Vologda, Novgorod, Pskov, Leningrad regions, the Komi ASSR, Estonian SSR, Latvian SSR, and Lithuanian SSR in 1984-1987. Different activity and variable species-specific composition of animal virus carriers in the north, south, and west of the north-western region were demonstrated. Circulation of HFRS virus of the first, "eastern", serotype has first been detected in the European USSR.