Lyme Disease

This information is useful for children, adults, and older adults
A woman's brown boot in leaves where it's possible to pick up a tick that may carry Lyme disease.

In the wooded and grassy areas of the upper midwest and northeastern United States, deer ticks, which are small, black-legged insects that can carry a bacterial infection called Lyme disease, can bite a person and pass this infection on. If left untreated, the disease can lead to neurological problems and rheumatoid arthritis. 

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.