Corynebacterium spp.

  • Douglas I. Johnson
Chapter

Abstract

  • Genomics:
    • Corynebacterium diphtheriae: chromosome 2,488,635 bp; 2320 predicted ORFs (Cerdeno-Tarraga et al. 2003)

  • Cell morphology:
    • Rod-shaped cells; irregular, club-shaped (Coryne), or V-shaped arrangements (Fig. 4.1)
      • Can undergo snapping movements after cell division – cause cells to look like Chinese letters or palisades

    • Club shape due to metachromatic polyphosphate granules at ends of cells

  • Gram stain:
    • Gram positive

  • Growth:
    • Aerobes; catalase positive.

    • Found in soil, water, and plants; nonpathogenic species are normal microbiota of the skin and most mucous membranes.

    • >120 species; C. diphtheriae is only a primary pathogen (due to toxin; see below):
      • C. amicolatum, C. striatum, C. urealyticum, C. ulcerans, C. xerosis, C. tuberculosis, and C. jeikeium are opportunistic pathogens of immunosuppressed patients.
        • C. jeikeium: “group JK”; lipophilic multidrug-resistant nosocomial pathogen; frequently associated with bone marrow transplant patients and intravascular devices

References

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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  • Douglas I. Johnson
    • 1
  1. 1.Department of Microbiology & Molecular GeneticsUniversity of VermontBurlingtonUSA

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