Ehrlichia are obligate intracellular coccobacilli resemblingrickettsia that have historically been associated with diseasesof animals. The etiologic agent of the hemorrhagic illness canineehrlichiosis, Ehrlichia canis, was first recognized in 1935,and other ehrlichia species, which infect horses and ruminants,have since been discovered.
The first human ehrlichial infection to be recognized was Sennetsufever, a mononucleosis-like illness described in Japan in 1954.The first report of ehrlichial infection in the United Stateswas in 1986: a man acquired the infection from a tick bite whiletraveling in Arkansas.1 Because the patient had an increasein antibodies to E. . . . [Full Text of this Article]
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