A few days later, you find a bull's eye-shaped rash on your arm.
This is when smart kids go to the doctor and get tested for Lyme disease. You can catch it when a blacklegged tick latches onto you to do what ticks do best: biting into your skin and sucking blood.
When it does, sometimes it transmits a tiny bacterium called Borrelia burgdorferi into your body. This is the bacterium that causes Lyme disease.
Lyme disease occurs mainly in suburban areas--or even in city parks--where there are lots of wild deer. Adult ticks obtain their blood meals from large or medium-sized mammals, and large deer populations make it easy for the ticks to find a quick bite!
Then the larvae become nymphs that lurk in the grass, on fallen logs, or in other good hiding places. When any suitable animal--such as a bird, a lizard, a deer, a dog, or a person--passes by, a nymph latches on to score a snack.
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