[A count of the vector portion of a population of the causative agent of tick-borne encephalitis connected with the imago of the taiga tick (Ixodes persulcatus)].

The paper presents results of individual virological investigation of about 2 thousand of hungry imagoes of Ixodes persulcatus Sch., collected for the estimation of the absolute number of ticks at test sites. This approach is shown to be suitable for estimating the ratio between the vectors with various virus doses, the number of vectors, and of the vector share in a virus population in natural tick-born encephalitis foci.