Moderate

Pathogenesis of diphtheria is attributed to__________________?

Correct answer: C. Exotoxin

  • A. Invasion
  • B. Endotoxin
  • C. Exotoxin
  • D. Capsule

Explanation

Corynebacterium diphtheriae causes disease mainly through diphtheria exotoxin, which inhibits host protein synthesis by inactivating elongation factor 2. The organism generally remains localized rather than invading deeply.

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