lyme disease definition
Lyme disease: An inflammatory disease that is caused by the bacterium Borrelia burgdorferi, which is transmitted to humans by the deer tick.The first sign of Lyme disease is a red, circular, expanding rash, usually radiating from the tick bite, followed by flu-like symptoms and joint pains.After the B. burgdorferi has entered the bloodstream, it can infect and inflame many different types of tissues, eventually causing many diverse symptoms.arly treatment with antibiotics is the best strategy for preventing major problems due to Lyme disease. Further prevention of Lyme disease involves avoiding areas where ticks are common, wearing protective clothing and lotion, and immediately removing any ticks from the body.