Lyme Disease

This information is useful for children, adults, and older adults
A closeup of a woman's brown boot walking through the woods with fall foliage.
Why Yale Medicine?
  • Lyme disease was first identified by Yale physicians in the summer of 1975.
  • Thanks to a powerful partnership with research programs at Yale Medicine, patients benefit from the most recent advantages in treatment.
  • Our doctors use a multi-disciplinary approach to treating patients with Lyme disease.

Deep in the wooded and grassy areas of the northern United States and Europe live deer ticks—small, black-legged insects that can carry a bacterial infection called Lyme disease that, if left untreated, can lead to neurological problems and rheumatoid arthritis. Each year, from 240,000 to 440,000 new cases of Lyme disease are diagnosed in the United States.

The discovery of Lyme disease is credited to two Yale physicians who identified the mysterious inflammatory disease after a rash of illnesses cropped up during the summer of 1975. Yale Medicine scientists are now exploring the different causes of nerve damage, and developing new ways to regrow damaged nerve cells.