IxodidaeRickettsia rickettsiiRocky Mountain Spotted FeverTicksTick InfestationsRickettsiaRickettsia InfectionsArachnid VectorsTick-Borne DiseasesEhrlichia ruminantiumHeartwater DiseaseRhipicephalus sanguineusNymphDermacentorEhrlichia chaffeensisIxodesRhipicephalusBorreliaBorrelia InfectionsCoxiellaRickettsia typhiRickettsial VaccinesRickettsiaceaeRickettsia prowazekiiEhrlichiosisDNA, BacterialTick ControlBrazil