Ixodes is a genus of hard-bodied ticks (family Ixodidae). It includes important disease vectors of animals and humans (tick-borne disease). Some ticks in this genus may transmit the pathogenic bacterium Borrelia burgdorferi responsible for causing Lyme disease. Additional organisms that may be transmitted by Ixodes are parasites from the genus Babesia which cause Babesiosis, and bacteria from the genus Ehrlichia which cause Ehrlichiosis.
Ticks can be transmitted through handling of livestock such as cows, horses and domestic deer.