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Most human infections with Y.enterocolytica involve serotypes 0:3, 0:5, 0:8 and 0:9

Yersinia enterocolitica

  • General information

    • the following information is not yet verified
      Taxonomy
      Family: Enterobacteriaceae

      Yersinia has 3 species of which are pathogenic for humans, namely

      Y. enterocolitia, Y. pseudotuberculosis and Y. pestis

      Natural habitats
      Comes in all animal species, but has also been isolated from (drinking) water, soil and vegetables, also from animal products such as raw milk, cream, ice cream, beef, pigs oysters, lamb and chicken.

      Clinical significance
      They can cause yersiniosis in human and animals and they are a significant food-borne pathogen.

      Infection usually lead to mild self-limiting enterocolitis, terminal ileitis and adenitis in humans.

      Symptoms may include watery or bloody diarrhea and fever.

      The infections are sometimes followed by chronic inflammatory diseases such as arthritis and erythema nodosum

      Sepsis may occur with a high mortality in debilitated patients with severe underlying diseases.

      Yersinia can also occur in pus of deep abscesses.

  • Gram stain

    • the following information is not yet verified
      Gram negative coccoid rods,

      1.0-3.0 x 0.5-0.8 µm,

      sometimes bipolar colored.

  • Culture characteristics

    • the following information is not yet verified

      Facultative anaerobic

      Colonies are gray and smooth, some stains form a yellow to light yellow pigment.

      Colonies grow more slowly and are small, gray-white, opaque, smooth and 0.1 to 1.0 mm in diameter after 24 hours of incubation

      McC growth, non lactose fermenter

      CIN agar / Yersinia selective agar
      Clear colonies with red center,

      so-called "bulls-eye"

      BBAØ growth

      motility
      < 30°C peritrichous flagella
      > 30°C non motile

  • Characteristics

  • References


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