Merck Manual

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An Adult Deer Tick
An Adult Deer Tick
An Adult Deer Tick

The bacteria that cause Lyme disease are transmitted by the deer tick (Ixodes), so named because the adult ticks often feed on the blood of deer. This adult tick is shown on a blade of grass.

Image courtesy of James Gathany via the Public Health Image Library of the Centers for Disease Control and Prevention.

In these topics
Lyme Disease