Ticks wait on bushes for passing rabbits and deer. The
tick attaches to a host with its mouth and eats blood. If you
walk through the brush, check your clothing for ticks. Ticks are
arachnids like spiders because they have 4 pairs of legs. A hungry
tick is about 4 mm long. A tick engorged with blood may be 5 times
that size (to 2 cm). The Western Blacklegged tick can transmit
In the United States, ticks transmit more vector-borne diseases
than any other arthropod. In 1995, Lyme Disease was the ninth
most frequently reported of the 52 diseases that are reportable
to the Centers for Disease Control and Prevention, with 3.7 cases
per 100,000 people.
Click on the ticks to
the 9 most common tick-borne diseases in the U.S.
a medical problem about ticks.