IxodidaeTicksRocky Mountain Spotted FeverTick InfestationsRickettsiaArachnid VectorsRickettsia InfectionsTick-Borne DiseasesEhrlichia ruminantiumHeartwater DiseaseNymphIxodesRhipicephalusRhipicephalus sanguineusBorreliaDermacentorBorrelia InfectionsEhrlichia chaffeensisTick ControlRickettsia rickettsii