| detection of rickettsia helvetica and candidatus r. tarasevichiae dna in ixodes persulcatus ticks collected in northeastern european russia (komi republic). | the number of tick-borne infections in the northern european regions of russia has increased considerably in the last years. in the present study, 676 unfed adult ixodes persulcatus ticks were collected in the komi republic from 2011 to 2013 to study tick-borne rickettsioses. rickettsia spp. dna was detected by pcr in 51 (7.6%) ticks. the nucleotide sequence analysis of glta fragments (765bp) from 51 ticks indicated that 60.8% and 39.2% of the ticks were infected with rickettsia helvetica and ca ... | 2017 | 28433730 |