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Yersinia pseudotuberculosis
Scientific classification
Kingdom: Bacteria
Phylum: Proteobacteria
Class: Gammaproteobacteria
Order: Enterobacteriales
Family: Enterobacteriaceae
Genus: Yersinia
Species: Y. pseudotuberculosis
Binomial name
Yersinia pseudotuberculosis
(Pfeiffer 1889)
Smith & Thal 1965

Yersinia pseudotuberculosis is a Gram-negative bacterium which primarily causes disease in animals; humans occasionally get infected zoonotically, most often through the food-borne route.[1]


In animals, Y. pseudotuberculosis can cause tuberculosis-like symptoms, including localized tissue necrosis and granulomas in the spleen, liver, and lymph node.

In humans, symptoms are similar to those of infection with Yersinia enterocolitica (fever and right-sided abdominal pain), except that the diarrheal component is often absent, which sometimes makes the resulting condition difficult to diagnose. Y. pseudotuberculosis infections can mimic appendicitis, especially in children and younger adults, and, in rare cases the disease may cause skin complaints (erythema nodosum), joint stiffness and pain (reactive arthritis), or spread of bacteria to the blood (bacteremia).

Infection usually becomes apparent 5–10 days after exposure and typically lasts 1–3 weeks without treatment. In complex cases or those involving immunocompromised patients, antibiotics may be necessary for resolution; ampicillin, aminoglycosides, tetracycline, chloramphenicol, or a cephalosporin may all be effective.

The recently described syndrome Izumi-fever has been linked to infection with Y.pseudotuberculosis.[2]


  1. ^ Ryan KJ; Ray CG (editors) (2004). Sherris Medical Microbiology (4th ed. ed.). McGraw Hill. ISBN 0-8385-8529-9.  
  2. ^ Jani, Asim (2003). "Pseudotuberculosis (Yersina)". Retrieved 2006-03-04.  

External links



Up to date as of January 23, 2010

From Wikispecies


Main Page
Superregnum: Bacteria
Regnum: Bacteria
Phylum: Proteobacteria
Classis: Gamma Proteobacteria
Ordo: Enterobacteriales
Familia: Enterobacteriaceae
Genus: Yersinia
Species: Yersinia pseudotuberculosis
Strain: Yersinia pseudotuberculosis IP 31758 - Yersinia pseudotuberculosis IP 32953 -


Yersinia pseudotuberculosis (Pfeiffer, 1889) Smith & Thal, 1965


Vernacular names

日本語: 仮性結核
Suomi: Valetuberkuloosi


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