Colon non tumor
Infectious colitis (specific microorganisms)
Yersinia infections of colon

Author: Nat Pernick, M.D. (see Authors page)

Revised: 10 January 2017, last major update July 2006

Copyright: (c) 2003-2017,, Inc.

PubMed search: Yersinia infections of colon

Cite this page: Yersinia infections. website. Accessed February 25th, 2017.
Definition / General
Yersinia enterocolitica:
  • Gram negative rod, motile and aerobic, which causes diarrhea (mild self limited to typhoid fever-like disease), may cause peritonitis, pharyngitis, pericarditis
  • From contaminated milk or pork
  • Invades ileal mucosa, multiplies in Peyer's patches and regional lymph nodes
  • Also affects right colon and appendix
  • May cause arthritis (Clin Infect Dis 1997;25:831)
  • May trigger collagenous colitis (Dig Dis Sci 1998;43:1341, Scand J Gastroenterol 2002;37:711)

Yersinia pseudotuberculosis:
  • Similar to Y. enterocolitis plus true granulomas with neutrophilic core
Case Reports
Clinical Images

Images hosted on other servers:

Mesenteric lymphadenopathy

Multiple mucosal aphthae

Micro Description
  • Ulcers overlying lymphoid nodules
  • Necrotizing microgranulomas
Micro Images

Images hosted on other servers:


Suppurative granuloma

Mesenteric lymphadenitis

Additional References
Yersinia enterocolitica:
Yersinia pseudotuberculosis: