[Comparative characterization of a risk for infection with tick-borne encephalitis in the foci with different regional confinement].

A comparative study of the foci of tick-borne encephalitis (TBE) has revealed that the infectivity of vectors taiga ticks (Ixodes persulcatus) plays the leading role in the formation of foci with the highest epidemic activity (including forest steppe ones). The morbidity rates in each regional focus are directly related to the number of tick-bitten persons and to the quantity of the vector.