AnaplasmaAnaplasmosisRickettsiaAnaplasma marginaleAnaplasma ovisChromosomes, Human, 19-20Rickettsia InfectionsRickettsia prowazekiiRickettsia rickettsiiRickettsia felisEhrlichiosisAnaplasma centraleTicksDermacentorTyphus, Epidemic Louse-BorneTick-Borne DiseasesRocky Mountain Spotted FeverIxodesBoutonneuse FeverOrientia tsutsugamushiTyphus, Endemic Flea-BorneArachnid VectorsIxodidaeTick InfestationsSiphonapteraArthropod VectorsEhrlichiaAnaplasmataceae InfectionsAnaplasmataceaeBacterial Outer Membrane ProteinsRickettsiaceaeNymphDNA, BacterialAntibodies, BacterialCoxiellaCattle DiseasesBabesia microtiBabesiaDeerRickettsieaeEhrlichia chaffeensisColipasesRNA, Ribosomal, 16SRickettsial VaccinesPhylogenyRickettsiaceae InfectionsDog DiseasesPolymerase Chain ReactionMolecular Sequence DataSequence Analysis, DNADisease ReservoirsCitrate (si)-SynthaseRhipicephalusBabesiosisTarsal BonesRickettsia akariBorrelia burgdorferiBacterial ProteinsSeroepidemiologic StudiesEhrlichia ruminantiumPhthirapteraHL-60 CellsNeorickettsia