EhrlichiaEhrlichia chaffeensisEhrlichia canisEhrlichiosisEhrlichia ruminantiumRickettsiaceaeRickettsiaceae InfectionsAnaplasmaDog DiseasesTicksAnaplasmataceaeIxodesHeartwater DiseaseDogsHorse DiseasesTick-Borne DiseasesRNA, Ribosomal, 16STick InfestationsAnaplasmosisAntibodies, BacterialDNA, BacterialPolymerase Chain ReactionMolecular Sequence DataArachnid VectorsNeorickettsiaHorsesAnaplasma phagocytophilumAntigens, BacterialPhylogenyRickettsiaArthropod VectorsIxodidaeSequence Analysis, DNAAnaplasmataceae InfectionsDNA, RibosomalDeerBacterial ProteinsBabesiaRickettsia rickettsiiRickettsieaeAnaplasma centraleRhipicephalus sanguineusDoxycyclineBartonellaFluorescent Antibody Technique, IndirectBase SequenceSerologic TestsSpecies SpecificityChaperoninsDisease ReservoirsRNA, BacterialChromosome WalkingGranulocytesBacterial Outer Membrane ProteinsGenes, BacterialOxytetracyclineAnaplasma marginaleSeroepidemiologic StudiesAmino Acid SequenceArgasNymphBabesiosis