Skip Navigation LinksTick-Borne-Diseases

Tick-Borne Diseases

Ticks are small, insect-like creatures most often found in naturally vegetated areas. Ticks feed by attaching to animals and humans, sticking their mouthparts into the skin, and sucking blood for up to several days. There are many different kinds of ticks in California, but only six kinds are known to commonly bite humans. Sometimes these ticks carry germs (like bacteria or viruses) that can be transmitted to a person while the tick is attached and feeding. Avoiding tick bites is the best way to avoid getting these diseases.​​​

Seasonal Risk of Exposure to Infected Western Blacklegged Ticks in California


click to enlarge (PDF)

Educational Materials  

If you would like to request copies of these educational materials for your agency or program, please contact the CDPH Vector-Borne Disease Section at (916) 552-9730 or email​ ​​


Page Last Updated :