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[[Lyme disease]] is caused by the bacterium Borrelia burgdorferi and is transmitted to humans by the bite of infected black-legged ticks.<ref>This entry copies some statements from the government site [http://www.cdc.gov/ncidod/dvbid/lyme/index.htm CDC information], which is in the public domain, while adding other statements that are original.</ref> 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 caused by the bacterium Borrelia burgdorferi and is transmitted to humans by the bite of infected black-legged ticks.<ref>This entry copies some statements from the government site [http://www.cdc.gov/ncidod/dvbid/lyme/index.htm CDC information], which is in the public domain, while adding other statements that are original.</ref> Typical symptoms include fever, headache, fatigue, and a characteristic skin rash called [[Erythema Multiforme|erythema]] migrans. If left untreated, infection can spread to joints, the heart, and the nervous system.  

Human beings may come into contact with infected ticks during outdoor activities (camping, hiking).  Symptoms include fatigue, chills, fever, headache, joint and muscle pain, swollen lymph nodes and a skin rash (in a circular pattern).  Long-term problems include arthritis, nervous system abnormalities, irregular heart rhythm and meningitis.

Human beings may come into contact with infected ticks during outdoor activities (camping, hiking).  Symptoms include fatigue, chills, fever, headache, joint and muscle pain, swollen lymph nodes and a skin rash (in a circular pattern).  Long-term problems include arthritis, nervous system abnormalities, irregular heart rhythm and meningitis.