Lyme Disease - Page 1 Chloe Nguyen Professor Bush MEDA 115...

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Page 1 Chloe Nguyen Professor Bush MEDA 115 March 23 2011 Project Lyme disease Lyme disease is caused by the bacteria Borrelia burgdorferi, which is usually transmitted to people by deer ticks (Merck 1478). Lyme disease can affect the skin, joints, heart, and nervous system (Frazier 288). Lyme disease was recognized and named in 1975 when a cluster of cases occurred in Lyme, Connecticut. It is now the most common insect-borne infection in the United States. It occurs in 49 states, about 90% of the cases occur along the northeastern coast from Massachusetts to Maryland. Most of the remaining reported cases occur in Wisconsin, Minnesota, and the coastal regions of northern California and Oregon. Lyme disease also occurs in Europe, China, Japan, Australia, and the former Soviet Union (Merck 1478). In Essentials of Diseases and Conditions, there was not any statistics of Lyme disease. It was described in a general way “in all 50 states and on five continents” (Frazier 288). Etiology The bacteria Borrelia burgdorferi that cause Lyme disease are transmitted to people when an infected tick (most of the cases are caused by a deer tick, Ixodes scapularis) bites and stays attached for one or two days. Brief periods of attachment rarely transmit disease. At first, the bacteria multiply at the site of the tick bite. After 3 to 32 days, the bacteria migrate from the site
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Lyme Disease - Page 1 Chloe Nguyen Professor Bush MEDA 115...

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