Category: Lyme Disease

Lyme disease is caused by the bacterium Borrelia burgdorferi and is transmitted to humans by the bite of infected blacklegged ticks. Typical symptoms include fever, headache, fatigue, and a characteristic skin rash called erythema migrans. If left untreated, infection can spread to joints, the heart, and the nervous system. Lyme disease is diagnosed based on symptoms, physical findings (e.g., rash), and the possibility of exposure to infected ticks; laboratory testing is helpful in the later stages of disease.

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Lyme disease is caused by the bacterium, Borrelia burgdorferi, and it can infect various areas of the body. Because of this, lyme disease can cause different symptoms at different times. Not all people exhibit all the symptoms of lyme disease, but the first sign of lyme disease infection is often a circular rash called erythema migrans (EM). Other symptoms include fever, headache, and fatigue.

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Lyme disease is diagnosed based on symptoms, objective physical findings (such as erythema migrans, facial palsy, or arthritis), and a history of possible exposure to infected ticks. Validated laboratory tests can be very helpful but are not generally recommended when a patient has erythema migrans.

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