Ehrlichiosis and Anaplasmosis

Transmission

Both ehrlichiosis and anaplasmosis are transmitted by the bite of an infected tick. The most important carriers of anaplasmosis in the United States are the western blacklegged tick and the deer tick, both of which also transmit Lyme disease. Human monocytic ehrlichiosis, or HME, is transmitted by the lone star tick and possibly other species.

Western Blacklegged Tick. Credit: Centers for Disease Control and Prevention

Lone Star Tick Credit: Centers for Disease Control and Prevention