Abstract
Within the phylum Artropoda, the ticks are considered vectors for a number of infectious agents greater than any other group, including mosquitoes. In different parts of the world, including the Americas, the tick Rhipicephalus sanguineus is the main vector, if not the only, the bacterium Ehrlichia canis, the etiologic agent of canine monocytic ehrlichiosis (EMC). EMC in Brazil has shown …