EhrlichiaRickettsiaceaeAnaplasmataceaeEhrlichia chaffeensisAnaplasmaEhrlichia canisEhrlichiosisEhrlichia ruminantiumRickettsiaceae InfectionsDog DiseasesTicksRNA, Ribosomal, 16SPhylogenyDNA, RibosomalDNA, BacterialIxodesHeartwater DiseaseDogsTick-Borne DiseasesHorse DiseasesTick InfestationsMolecular Sequence DataAnaplasmosisSequence Analysis, DNAAntibodies, BacterialPolymerase Chain ReactionArachnid VectorsNeorickettsiaHorsesAnaplasma phagocytophilumRickettsiaGenes, rRNAArthropod VectorsAntigens, BacterialSpecies SpecificityIxodidaeAnaplasmataceae InfectionsRNA, Bacterial