Introduction The etiologic agent of canine monocytic ehrlichiosis (CME), the rickettsia Ehrlichia canis (E. canis), is a small pleomorphic gram-negative coccoid bacteria that parasitizes circulating monocytes intracytoplasmically in clusters of organisms called morulae. The disease is also known as canine rickettsiosis, canine hemorrhagic fever, tracker dog disease, canine tick typhus, Nairobi ...
