🦠microbiology review

Guillain-Barré syndrome (GBS)

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Guillain-Barré syndrome (GBS) is a rare autoimmune disorder where the body's immune system attacks the peripheral nervous system, leading to muscle weakness and paralysis. It often follows an infection and can be life-threatening if not treated promptly.

5 Must Know Facts For Your Next Test

  1. GBS is often preceded by a bacterial or viral infection, such as Campylobacter jejuni or influenza.
  2. Symptoms of GBS typically start with tingling and weakness in the legs and can progress to full-body paralysis.
  3. Diagnosis of GBS is primarily clinical but may include nerve conduction studies and cerebrospinal fluid analysis showing elevated protein levels.
  4. Treatment for GBS commonly involves intravenous immunoglobulins (IVIG) or plasmapheresis to reduce the immune response.
  5. While most patients recover fully, some may experience long-term effects like weakness, numbness, or fatigue.

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