RickettsiaRickettsia InfectionsRickettsia prowazekiiRickettsia rickettsiiRickettsia felisGenomeTyphus, Epidemic Louse-BorneGenome, BacterialRocky Mountain Spotted FeverBoutonneuse FeverGenome, ViralOrientia tsutsugamushiTyphus, Endemic Flea-BorneTicksSiphonapteraGenome, PlantGenome, HumanDermacentorIxodidaeTick-Borne DiseasesPhylogenySequence Analysis, DNAGenome, MitochondrialCoxiellaRickettsiaceaeRickettsieae