Unformatted text preview: lymph nodes. Blood vessels in internal organs also damaged (brain, heart, lungs). Lyme Disease - Borrelia burgdorferi Gram neg. spirochete Reservoir: Field mice (host for immature tick). Deer are not infected - breeding ground for ticks. Vector: Deer tick - infected when takes blood meal from infected animal → transmitted to susceptible animal or human upon taking subsequent blood meal. Disease: occurs in 3 stages: 1) Onset characterized by "bulls eye" red rash at site tick bite - clears in center as spreads. Accompanied or followed by flu-like illness, rash fades 2) Second phase occurs weeks, months later. Heart & neurological involvement - irregular heartbeat, facial paralysis, meningitis, encephalitis 3) Third phase occurs months, years later. Severe arthritis develops probably due to immune responses. Can cause crippling. Prevention: avoid tick bites...
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- Fall '09
- Tick, gram neg., Gram pos. bacilli, Gram neg. bacilli