Lyme
 disease is an illness caused by the organism Borrelia burgdorferi, a 
bacterium known as a spirochete that is carried by a deer tick. The 
spirochete can be transmitted to people or animals by the bite of a tick
 — with the first signs of Lyme disease developing within days or 
months. Sixty to eig…
nationalmssociety.org
 
 
