Lymph nodes - not lymphoma
Infectious / parasitic disorders
Yersinia enterocolitica

Author: William D. DePond, M.D. (see Authors page)

Revised: 2 July 2018, last major update June 2006

Copyright: (c) 2003-2018,, Inc.

PubMed Search: Yersinia enterocolitica lymph nodes

Cite this page: DePond, W.D. Yersinia enterocolitica. website. Accessed August 17th, 2018.
Definition / general
  • Clinical picture usually resembles acute appendicitis but laparotomy often shows mesenteric lymphadenitis (Pediatr Surg Int 1998;13:2)
  • Similar to Y. pseudotuberculosis
  • Usually self limited
  • Gram stain: gram negative, polymorphic, coccoid or ovoid mobile bacteria
  • PCR
  • Cultures
Case reports
Microscopic (histologic) description
  • Capsular thickening and edema
  • Immunoblasts and plasma cells in cortical and paracortical region
  • Large lymphocytes within sinuses, germinal center hyperplasia
  • No granulomas (unlike Y. pseudotuberculosis)