| expanded geographic distribution and clinical characteristics of ehrlichia ewingii infections, united states. | ehrlichiosis is a bacterial zoonosis, spread through the bites of infected ticks, that is most commonly caused in the united states by infection with the bacterium ehrlichia chaffeensis. we retrospectively reviewed samples from an 18-month study of ehrlichiosis in the united states and found that e. ewingii was present in 10 (9.2%) of 109 case-patients with ehrlichiosis, a higher rate of infection with this species than had previously been reported. two patients resided in new jersey and indiana ... | 2016 | 27089171 |