Lymph nodes & spleen, nonlymphoid
Lymph nodes-infectious / parasitic disorders

Topic Completed: 1 June 2006

Minor changes: 14 August 2020

Copyright: 2003-2020,, Inc.

PubMed Search: Yersinia enterocolitica lymph nodes

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Cite this page: DePond W. Yersinia. website. Accessed October 24th, 2020.
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)
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