Definition

• Yersiniosis is an uncommon bacterial zoonosis.
• Caused primarily by infection with either of 2 enteropathogenic Yersinia species
  • Y. enterocolitica
  • Y. pseudotuberculosis
• Most common acute clinical manifestations
  
  • Enteritis or enterocolitis with self-limited diarrhea (especially with Y. enterocolitica)
  • Mesenteric adenitis and terminal ileitis (especially with Y. pseudotuberculosis)
    • Can be confused with acute appendicitis
  • Nonsuppurative, extraintestinal, inflammatory sequelae, such as reactive arthritis and erythema nodosum
• Other species associated with enteritis or enterocolitis in humans (particularly immunocompromised adults)
  • Y. intermedia
  • Y. frederiksenii
  • Y. kristensenii
  • Little is known about pathogenicity, public health importance, or clinical management.

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