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Int J Syst Evol Microbiol 58 (2008), 1635-1639; DOI  10.1099/ijs.0.64952-0
© 2008 International Union of Microbiological Societies

Rickettsia raoultii sp. nov., a spotted fever group rickettsia associated with Dermacentor ticks in Europe and Russia

Oleg Mediannikov1,2, Kotaro Matsumoto1, Irina Samoylenko3, Michel Drancourt1, Véronique Roux1, Elena Rydkina4, Bernard Davoust5, Irina Tarasevich2, Philippe Brouqui1 and Pierre-Edouard Fournier1

1 Unité des Rickettsies, CNRS UMR6020, IFR 48, Université de la Méditerranée, Faculté de Médecine, 27 Blvd Jean Moulin, 13385 Marseille cedex 5, France
2 Gamaleya Research Institute of Epidemiology and Microbiology, Moscow, Russia
3 Omsk Research Institute of Natural Foci Infections, Omsk, Russia
4 Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
5 Direction Régionale du Service de Santé des Armées, 83800 Toulon Armées, France

Correspondence
Pierre-Edouard Fournier
Pierre-Edouard.Fournier{at}medecine.univ-mrs.fr

We describe the characterization of a novel Rickettsia species cultivated from Dermacentor ticks collected in Russia and France, for which we propose the name Rickettsia raoultii sp. nov. Using multigene sequencing, we demonstrated that five rickettsial isolates from Dermacentor silvarum, Dermacentor reticulatus, Dermacentor marginatus and Dermacentor nuttalli ticks were classified within this novel spotted fever rickettsia species. This rickettsia also exhibited a serotype distinct from previously described Rickettsia species. The type strain of Rickettsia raoultii sp. nov. is strain KhabarovskT (=CSUR R3T =ATCC VR-1596T).

Abbreviations: MIF, microimmunofluorescence; SPD, specificity difference

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene, gltA, ompA, ompB and sca4 sequences of strain KhabarovskT are DQ365810, DQ365804, DQ365801, DQ365798 and DQ365808, respectively, and those of the ftsY and rpoB gene sequences of strains KhabarovskT and Marne are respectively DQ387058 and DQ387059 (ftsY) and DQ365812 and DQ365811 (rpoB). Accession numbers for sequences from other strains are detailed in Table 1.






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