Guillain-Barre syndrome is best categorized as which type of hypersensitivity?

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Study for the NBME Immunology Test. Study with flashcards and multiple choice questions, each question includes hints and explanations. Prepare to excel!

Multiple Choice

Guillain-Barre syndrome is best categorized as which type of hypersensitivity?

Explanation:
Guillain-Barré syndrome is best viewed as a delayed-type hypersensitivity reaction, where T lymphocytes become activated against components of peripheral nerves after an infection. These T cells release cytokines that recruit macrophages, leading to inflammatory demyelination of the peripheral nerves and nerve roots. This cell-mediated attack explains the acute, ascending weakness and areflexia characteristic of the condition. Although antibodies can be involved, the key effector process is T-cell–mediated, which fits type IV hypersensitivity.

Guillain-Barré syndrome is best viewed as a delayed-type hypersensitivity reaction, where T lymphocytes become activated against components of peripheral nerves after an infection. These T cells release cytokines that recruit macrophages, leading to inflammatory demyelination of the peripheral nerves and nerve roots. This cell-mediated attack explains the acute, ascending weakness and areflexia characteristic of the condition. Although antibodies can be involved, the key effector process is T-cell–mediated, which fits type IV hypersensitivity.

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