Animals Involved
Wild rodents, deer may be reservoirs in North America; livestock, wild ungulates, wild rodents may be reservoirs in Europe; many other animals (eg, equids, ruminants, dogs, cats, birds) can also be infected
Known Distributions
Worldwide
Probable Means of Spreading
Tick bites (Ixodes spp)
Clinical Manifestations in People
Resembles human monocytic ehrlichiosis; often asymptomatic to mild in immunocompetent; rash uncommon; estimated case fatality rate <1%