11/01/2025
Lyme Disease
👉Definition:
A multisystem disease transmitted by the bite of Ixodes scapularis tick infected with Borrelia spirochetes.
👉Etiology:
• Borrelia burgdorferi (N. America, Europe)
• Borrelia mayonii (N. America Midwest)
• Borrelia afzelii, B. garinii (Europe, Asia)
👉Epidemiology:
• Many patients unaware of tick bite
• Incubation: 2–31 days
• Geography & season are key clues
👉Pathophysiology:
Disseminated disease = spirochetemia.