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Ehrlichia ewengii as
a cause of granulocytic ehrlichiosis in dogs and humans |
This is an Ehrlichia agent previously shown to infect
granulocytes in dogs and cause signs of fever, lameness, and thrombocytopenia
similar to infection with A. phagocytophila. Recently,
it has also been shown to be another cause of granulocytic ehrlichiosis
in humans, that is clinically indistinguishable from HGE caused
by infection with A. phagocytophila. The organism is primarily
transmitted by the lone-star tick, Amblyomma americanum,
and white-tailed deer are the primary reservoir of the organism
in nature.