Lyme disease - primary

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Lyme disease, erythema chronicum migrans Lyme disease organism, Borrelia burgdorferi Deer ticks Ticks Lyme disease - Borrelia burgdorferi organism Lyme disease Tick imbedded in the skin

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Lyme disease - primary

Primary Lyme disease is an inflammatory disease characterized by a skin rash (or rashes) and flu-like symptoms caused by the bacterium Borrelia burgdorferi and transmitted by the deer tick.

Primary Lyme disease, a flu-like illness with fever, chills, and muscle aches, occurs in about 50% of those infected with Lyme disease. If untreated, the disease may progress to secondary Lyme disease and tertiary Lyme disease.

Risk factors include recent tick bite or recent outdoor activities in endemic (high risk) areas. Approximately 16,000 people are affected annually in the United States. See also Lyme disease.

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