Lyskovtsev MM, 1968. Tick-borne rickettsiosis. Misc Pub Entomol Soc America 6 :42–140.
Rudakov NV, 1996. Tick-borne rickettsiosis in Russia: epidemiology and current conditions of natural foci. Kazar J, Toman R, eds. Proceedings of the Fifth International Symposium on Rickettsiae and Rickettsial Diseases. Bratislava: Veda, 216–220.
Tarasevich IV, Makarova V, Fetisova NF, Stepanov A, Mistkarova E, Balayeva NM, Raoult D, 1991. Astrakhan fever: a new spotted fever group rickettsiosis. Lancet 337 :172–173.
Mediannikov OY, Sidelnikov Y, Ivanov L, Mokretsova E, Fournier PE, Tarasevich I, Raoult D, 2004. Acute tick-borne rickettsiosis caused by Rickettsia heilongjiangensis in Russian Far East. Emerg Infect Dis 10 :810–817.
Raoult D, Lakos A, Fenollar F, Beytout J, Brouqui P, Fournier PE, 2002. Spotless rickettsiosis caused by Rickettsia slovaca and associated with Dermatocentor ticks. Clin Infect Dis 34 :1331–1336.
Shpynov S, Parola P, Rudakov N, Samoilenko I, Tankibaev M, Tarasevich I, Raoult D, 2001. Detection and identification of spotted fever group rickettsiae in Dermacentor ticks from Russia and central Kazakhstan. Eur J Clin Microbiol Infect Dis 20 :903–905.
Balayeva NM, Eremeeva ME, Ignatovich VF, Rudakov NV, Reschetnikova TA, Samoilenko IE, Yastrebov VK, Raoult D, 1996. Biological and genetic characterization of Rickettsia sibirica strains isolated in the endemic area of the north Asian tick typhus. Am J Trop Med Hyg 55 :685–692.
Roux V, Fournier PE, Raoult D, 1996. Differentiation of spotted fever group rickettsiae by sequencing and analysis of restriction fragment length polymorphism of PCR amplified DNA of the gene encoding the protein rOmpA. J Clin Microbiol 34 :2058–2065.
Roux V, Rydkina E, Eremeeva M, Raoult D, 1997. Citrate synthase gene comparison, a new tool for phylogenetic analysis, and its application for the rickettsiae. Int J Syst Bacteriol 47 :252–261.
Altschul SF, Madden TL, Schaffer AA, Zhang J, Zhang Z, Miller W, Lipman DJ, 1997. Gapped BLAST and PSI-BLAST: a new generation of protein database search programs. Nucleic Acids Res 25 :3389–3402.
Yu XJ, Fan MY, Bi DZ, 1991. Primary identification of spotted fever group rickettsiae BJ-90 strain. Chin J Microbiol Immunol 1 :28–33.
Yu X, Jin Y, Fan M, Xu G, Liu Q, Raoult D, 1993. Genotypic and antigenic identification of two new strains of spotted fever group rickettsiae isolated from China. J Clin Microbiol 31 :83–88.
Shpynov S, Fournier PE, Rudakov N, Raoult D, 2003. “Candidatus Rickettsia tarasevichiae” in Ixodes persulcatus ticks collected in Russia. Ann N Y Acad Sci 990 :162–172.
Shpynov S, Fournier PE, Rudakov N, Tankibaev M, Tarasevich I, Raoult D, 2004. Detection of a rickettsia closely related to Rickettsia aeschlimannii, “Rickettsia heilongjiangensis,” Rickettsia sp. strain RpA4, and Ehrlichia muris in ticks collected in Russia and Kazakhstan. J Clin Microbiol 42 :2221–2223.
Lou D, Wu YM, Wang B, Lui GD, Li JZ, Wang W, Han YF, 1985. A new member of the spotted fever group of rickettsiae-rickettsia. Chin J Microbiol Immunol 5 :250–253.
|Past two years||Past Year||Past 30 Days|
|Full Text Views||215||118||15|
Thirty-one rickettsial isolates from ticks or patients in North Asian tick typhus (NATT) foci from the Ural region to the Russian Far East were obtained at the Omsk Research Institute of Natural Foci Infections between 1954 and 2001. Using citrate synthase (gltA) and outermenbrane protein a (ompA) gene sequencing, we identified these isolates as Rickettsia sibirica sensu stricto (25 isolates), R. sibirica strain BJ-90 (2 isolates), R. slovaca (1 isolate), and R. heilongjiangensis (3 isolates). We demonstrate that Ixodes persulcatus ticks should be considered potential vectors of NATT. We also demonstrate the presence of R. slovaca in Ural and R. heilongjiangensis in Siberia and Russian Far East, where they may cause human infections misdiagnosed as cases of NATT. Clinicians should be aware that several spotted fever rickettsioses with different prognoses coexist in Russia in areas where NATT was the only previously recognized rickettsiosis.