High Prevalence of Rickettsia raoultii Found in Dermacentor Ticks Collected in Barnaul, Altai Krai, Western Siberia.

The prevalence of the tick-borne spotted fever group rickettsioses pathogens in ticks collected in Barnaul, the administrative center of Altai Krai, Western Siberia, was studied. The causative agent of tick-borne lymphadenopathy (TIBOLA) Rickettsia raoultii was revealed to be present in 61.9% of the samples from Dermacentor ticks. Moreover, Rickettsia helvetica has been identified in 5.1% of Ixodes ticks.