Anaplasma phagocytophilumAnaplasmosisEhrlichiosisTicksIxodesTick-Borne DiseasesArachnid VectorsHorse DiseasesTick InfestationsAnaplasmaHL-60 CellsAnaplasma marginaleHorsesBacterial Outer Membrane ProteinsArthropod VectorsAntibodies, BacterialDNA, BacterialMaineDermacentorCattle DiseasesIxodidaeLyme DiseaseEhrlichiaBabesiosisTrypanosomiasis, BovineTick ControlBabesiaEhrlichia chaffeensisBorrelia burgdorferiNymphSalivary GlandsRhipicephalusSerologic Tests