Disease
Lyme disease
Tick-borne multistage spirochetal illness
LYME dih-ZEEZ
High-yield clue
Lyme classically evolves in three stages - early localized erythema migrans, then early disseminated disease (facial palsy, carditis, multiple lesions), then late Lyme arthritis and neuroborreliosis.
Overview
A tick-borne multisystem illness caused by Borrelia burgdorferi, studied for its expanding erythema-migrans rash and staged progression. It matters as the most common vector-borne disease in the U.S. and a classic early-vs-late syndrome.
Classification
- Tick-borne multisystem syndrome
- Stages: early localized, early disseminated, late
- Zoonosis with rodent reservoir
- Region-linked (Northeast/upper Midwest) framing
Lab & identification clues
- Erythema migrans (expanding bull's-eye) vocabulary
- Ixodes (blacklegged) tick attachment ~36-48h concept
- Two-tier antibody testing (screen then confirmatory) vocabulary
- Late signs: arthritis, facial palsy, carditis, neuroborreliosis terms
Associations
- Transmitted by Ixodes ticks; deer and mice in cycle
- Peak in late spring-summer outdoor exposure
- At-risk framing: wooded/grassy endemic regions
- Bell's palsy and Lyme arthritis as later-stage associations
Commonly confused with
- Southern tick-associated rash illness (STARI)
- Rocky Mountain spotted fever
Frequently asked questions
What is Lyme disease?
A tick-borne multisystem illness caused by Borrelia burgdorferi, studied for its expanding erythema-migrans rash and staged progression. It matters as the most common vector-borne disease in the U.S. and a classic early-vs-late syndrome.
What is the high-yield clue for Lyme disease?
Lyme classically evolves in three stages - early localized erythema migrans, then early disseminated disease (facial palsy, carditis, multiple lesions), then late Lyme arthritis and neuroborreliosis.
What is Lyme disease associated with?
Lyme disease is associated with Transmitted by Ixodes ticks; deer and mice in cycle, Peak in late spring-summer outdoor exposure, At-risk framing: wooded/grassy endemic regions, and Bell's palsy and Lyme arthritis as later-stage associations.
What is Lyme disease commonly confused with?
Lyme disease is commonly confused with Southern tick-associated rash illness (STARI) and Rocky Mountain spotted fever.
Original student-study summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment, dosing, or specimen-handling guidance.