[The immunogenic and hemagglutinating activities of tick-borne encephalitis viral strains isolated from patients in different parts of the geographic range of the disease].

Considerable variability of the immunogenic and antigenic (in HA test) activity of tick-borne encephalitis virus strains was shown. No correlation was observed between the hemagglutinating activity of strains and their capacity to stimulate humoral immunity in the infected animals. The results of the study did not allow one to place strains into groups according to the area of isolation in relation to their immunogenic and antigenic activity.

[The infectiousness of Ixodes persulcatus ticks with the causative agents of Lyme disease and tick-borne encephalitis simultaneously].

By means of individual bacteriological and virological investigations of adult Ixodes persulcatus ticks and comparison of obtained results there has been established their simultaneous spontaneous infection with agents of Lyme disease and tick-borne encephalitis. A possible frequency of such mixed infection in these vectors is being discussed.