Current nowledge on phylogeny and taxonomy of Rickettsia spp Fournier, P. E. /Raoult, Didier Rickettsia taxonomy phylogeny review Due to improved diagnostic methods and increased interest, the number of representatives of the genus Rickettsia has increased dramatically over the past 20 years, with 25 currently validated species. These arthropod-associated intracellular bacteria are now recognized in all parts of the world. The comparison of the phylogenic organizations obtained from the study of several genes with different functions, and more recently from genomic sequences, provided basis to establish a reliable taxonomy of the bacteria included in the genus Rickettsia. These data were incorporated into polyphasic consensus guidelines that provide clear recommendations for the taxonomic classification and nomenclature of rickettsiae and rickettsial diseases. 2009 text https://www.documentation.ird.fr/hor/fdi:010046174 fdi:010046174 Fournier P. E., Raoult Didier. Current nowledge on phylogeny and taxonomy of Rickettsia spp. 2009, 1166, 1-11 EN