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Corynebacterium durum sp. nov., from Human Clinical Specimens
PHILIPPE RIEGEL," REMY HELLER, GILLES PREVOST, FRANCOIS JEHL, AND HENRI MONTEIL


http://ijs.sgmjournals.org/content/47/4/1107.full.pdf+html

Corynebacterium durum

  • General information

    • the following information is not yet verified
      The pathogenic potential of coryneform bacteria has been underestimated

      Taxonomy
      Family: Corynebacteriaceae

      Natural habitats
      They are part of the oropharynx and the most frequent Corynebacterium isolated from throat swabs of healthy persons.
      Its pathogenic potential remains unclear.

      Clinical significance
      Was originally described as being exclusively isolated from respiratory tract specimens,
      They have now also been discovered from the gingiva, blood cultures, and abscesses.

  • Gram stain

    • the following information is not yet verified
      Gram positive pleomorphic rods, 3-4 µm,

      and occasionally filaments, 15-30 µm,

      with occasionally swollen ends.

  • Culture characteristics

    • the following information is not yet verified

      Facultative anaerobic
      The isolation of C. durum may take longer than the other common corynebacteria.

      After 48h, cultures appear as small, 0.5-1mm after 72h, convoluted, raised beige and strongly adherent (not always) colonies with irregular edges.

      Strains incubated with 10% CO2,
      Colonies are larger, and have a dense center and nearly regular margins and they adhere weakly to the agar.

      Liquid media
      The organisms produced a sediment, leading to a granular appearance of the culture after broth was shaken.

      McConkey no growth

      BBAØ weak

  • Characteristics

  • References


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