Tick species guide
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Tick-borne diseases are becoming an increasing problem in the United States. Between 2014 and 2018, more than 200,000 cases were reported in the U.S.

Although there are hundreds of species of ticks found throughout the world, fewer than 60 are known to bite and spread disease to humans. Here are some of the more common human-biting ticks in the United States and the parts of the country where you'll most likely find them. These are images of unfed adult ticks.

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March 16, 2021