Reassessment of the taxonomic position of Rickettsiella grylli.

  title={Reassessment of the taxonomic position of Rickettsiella grylli.},
  author={Véronique Roux and Max Bergoin and N. Lamaze and Didier Raoult},
  journal={International journal of systematic bacteriology},
  volume={47 4},
We determined the 16S rRNA gene sequence of Rickettsiella grylli, an intracellular parasite of Gryllus bimaculatus and related species of crickets. Phylogenetic inferences made from alignment of this sequence with the sequences of other bacteria demonstrated that R. grylli is most closely related to Coxiella burnetii and Legionella species in the gamma subclass of the phylum Proteobacteria. R. grylli was previously thought to be related to members of the order Rickettsiales, but the… Expand
Molecular Characterization and Evolution of Arthropod-Pathogenic Rickettsiella Bacteria
Rickettsiella bacteria overall appear to form a monophyletic group that diverged from Coxiellaacteria ∼350 million years ago, and the genus Rickettsieella as a whole should be classified among the Gammaproteobacteria instead of the AlphaproteOBacteria. Expand
Introduction to the Rickettsiales and Other Intracellular Prokaryotes
The role bacteria may play as endosymbionts of eukaryotic cells is illustrated with some exam- ples, and the endosYmbiotic hypothesis for the origin of mitochondria is discussed. Expand
Current Knowledge on Phylogeny and Taxonomy of Rickettsia spp.
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 induded in the genus Rickettsia. Expand
Reorganization and Monophyly of the Genus Rickettsiella: All in Good Time
  • A. Leclerque
  • Medicine, Biology
  • Applied and Environmental Microbiology
  • 2008
The genus Rickettsiella of intracellular bacterial pathogens of arthropods currently comprises the three recognized species Rickettsiella popilliae , R. grylli , and R. chironomi , together withExpand
Rickettsiella-like Bacteria in Ixodes woodi (Acari: Ixodidae)
The results suggest that the I. woodi females harbored a single endosymbiotic bacterium related to selected Rickettsiella species and to C. burnetii, which clustered with the insect pathogenic species RickettsIElla grylli and the animal pathogen Coxiella burnettii. Expand
Phylogenetic analysis of spotted fever group rickettsiae by study of the outer surface protein rOmpA
Unite des rickettsies, CNRS UPRES-A 6020, Facult6 de Medecine, Universite de la Mediterranee, 27 Boulevard Jean Moulin, 13385 Marseille cedex 05, France Rickettsiae are classified in the orderExpand
Intraspecies diversity of Coxiella burnetii as revealed by com1 and mucZ sequence comparison.
Five and four groups were established from sequence analysis of com1 and mucZ, respectively and neither relation of the defined groups to geographical distribution of the isolates was noted nor relation to disease form (acute/chronic). Expand
'Candidatus Rhabdochlamydia crassificans', an intracellular bacterial pathogen of the cockroach Blatta orientalis (Insecta: Blattodea).
The 16S rDNA sequence of another Rickettsiella-like species, causing abdominal swelling to its cockroach host Blatta orientalis, was determined and phylogenetic analysis performed, confirming the affiliation of the cockroach pathogen within the order Chlamydiales and proposing its inclusion in the 'Candidatus Rhabdochlamydia crassificans' as a distinct taxon. Expand
Phylogenetic analysis of spotted fever group rickettsiae by study of the outer surface protein rOmpA.
To estimate the evolutionary forces that have shaped the members of the spotted fever group (SFG) rickettsiae, the ompA gene, encoding an antigenic high-molecular-mass membrane protein specific for the group, was amplified and sequenced from 21 isolates and indicated that this gene is undergoing neutral evolution. Expand
Type IV secretion system components as phylogenetic markers of entomopathogenic bacteria of the genus Rickettsiella.
The results firmly corroborate the previous 16S rRNA gene-based coassignment of the species R. popilliae to the gamma-proteobacterial order Legionellales and support the current classification of the investigated R. grylli and R. poppedilliae strains in different species of the same genus. Expand