IxodidaeRocky Mountain Spotted FeverTicksTick InfestationsRickettsia rickettsiiRickettsiaArachnid VectorsRhipicephalus sanguineusRickettsia InfectionsTick-Borne DiseasesEhrlichia ruminantiumHeartwater DiseaseNymphOklahomaIxodesRhipicephalusBorreliaDermacentorBorrelia InfectionsEhrlichia chaffeensisUnited States Indian Health ServiceTick Control