Shigella dysenteriae

Trevor A. Crowell, M.D.


  • Aerobic, Gram-negative bacillus (Figure)
  • Constitutes group A of the four Shigella groups (see Shigella species module for other species).
  • An infective dose of only 10 to 100 organisms facilitates spread during outbreaks.

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Last updated: May 10, 2023