Figure 4From: Seroprevalence of Ehrlichia canis, Ehrlichia chaffeensis and Ehrlichia ewingii in dogs in North AmericaSeroprevalence by county of E. chaffeensis (green) and E. ewingii (purple) in dogs for the mid-Atlantic, southeastern and central regions of the U.S.. A black dot indicates that at least one seroreactive sample was identified in that county.Back to article page