Authors: Elliot Weisenberg, M.D. (see Authors page)

Revised: 28 November 2016, last major update July 2012

Copyright: (c) 2003-2016,, Inc.

PubMed Search: gastric anthrax
Cite this page: Anthrax. website. Accessed October 18th, 2018.
Definition / general
  • Most severe and rarest form of anthrax occurs in stomach, due to ingestion of raw meat / milk from infected animals (Arch Pathol Lab Med 2003;127:761)
  • Only occurs in underdeveloped regions
  • Death due to marked fluid / blood loss from GI tract due to bacterial exotoxin (edema factor) that causes endothelial damage
  • Also hemorrhagic lymphadenitis, ascites, sepsis, bowel edema, obstruction, perforation
Gross description
  • Gastric ulceration, edema, hemorrhage
Microscopic (histologic) description
  • Extensive acute hemorrhagic gastritis and necrosis
  • Gram stain: large box car shaped, encapsulated, gram positive rods of Bacillus anthracis
Microscopic (histologic) images

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B: gram stain