Lyme disease was named in 1977 when arthritis was observed in a cluster of children in and around Lyme, Connecticut. Other clinical symptoms and environmental conditions suggested that this was an infectious disease probably transmitted by an arthropod. Further investigation revealed that Lyme disease is caused by the bacterium, Borrelia burgdorferi. These bacteria are transmitted to humans by the bite of infected deer ticks and cause more than 16,000 infections in the United States each year. The above information is from the Centers for Disease Control and Prevention web site. Read more.
Because CFS shares symptoms with other illnesses such as lyme disease, all other known health disorders must be ruled out by a thorough clinical evaluation and tests by your physician before a diagnosis of CFS can be made.
Symptoms of Lyme disease (pdf)