| EPIDEMIOLOGY |
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| n | Caused by
spirochete Borrelia |
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| burgdorferi |
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| n | Transmitted by Ixodes
ticks |
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| n | Nymph-stage
ticks feed on humans May |
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| through July -
transmit spirochete |
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| n | Endemic areas |
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| – | Northeastern
coastal states |
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| – | Wisconsin &
Minnesota |
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| – | Coast of Oregon
& northern California |
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