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Escherichia coli

  • General information

    • the following information is not yet verified
      Taxonomy
      Family: Enterobacteriaceae, genus: Escherichia coli
      E. albertii, E. fergusonii, E. hermannii, E. vulneris

      Natural habitats
      Widely distributed in nature, water, soil, foods and clinical samples.

      The genus Escherichia will occupy the last part of the small intestine and the large intestine in humans and warm-blooded animals. In more than 99% of the isolates, it is a Escherichia coli.

      E. coli is a good indicator of the water it is clean. (fecal contamination)

      Clinical significance
      They are generally located in the intestinal lumen (colon), but some strains can cause a variety of infections, enteritis, septicemia, peritonitis, urinary infections, meningitis (neonatal) etc, in humans and animals.

  • Gram stain

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

      1.1-1.5 x 2.0-6.0 µm.

      They occur singly or in pairs

  • Culture characteristics

    • the following information is not yet verified

      Facultative anaerobic

      Colonies may be smooth (S-type), low convex, moist and gray with a shiny surface, entire edge. R-type or mucoid forms may occur.

      Some strains are β-hemolytic.

      McConkey
      lactose fermenter: colonies are flat, dry and pink
      non lactose fermenter: colonies are pale

      BBAØ growth

  • Characteristics

  • References

    • James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition


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