Borrelia burgdorferi is a tick-borne bacteria that causes Lyme disease. The reservoir of the parasite, or place it is kept alive, is in mice. Specific ticks feed off the mice, become infected, and then feed on humans primarily during the warm summer months. The bacteria infect human blood, where they then continue to grow and sometimes present as a rash. The symptoms are non-specific and include fatigue, fever, headache, muscle, and joint aches. If B. burgdorferi spreads throughout the body without treatment (simple antibiotics), it can cause facial palsy (drooping), meningitis (brain infection/inflammation), joint pain, heart palpitations, and myocarditis 7.