A tick-borne disease which affects humans and other animals. Lyme disease was named after a place called Lyme in Connecticut, USA, where this disease was first recognized and has rapidly become the most prevalent tick-borne disease in the United States. Lyme disease is caused by a spirochete named Borellia burgdorferi which is carried in and transmitted to humans by the deer tick called Ixodes dammini although it can also be spread by other ticks such as the common dog (wood) ticks. The initial symptoms of Lyme disease include an acute headache, backache, chills, and fatigue and often a large rash at the biting site. Lyme disease can be easily treated with antibiotics such as tetracycline or penicillin. However delayed or improper treatment may lead to the infection of the central nervous system by the spirochete and result in visual disturbances, facial paralysis or seizures.