Corynebacterium Diphtheriae Disease

Corynebacterium Diphtheriae Disease

Corynebacterium diphtheriae is a causative agent of diphtheria.It is upper respiratory tract illness and it is a contageous disease.

1. Morphology

  • It is a Gram positive, non-motile, non spore forming bacteria.
  • Corynebacteria is non- capsulated slender rod.
  • It shows club shaped swelling and hence called as Corynebacteria.
  • Its size ranges from 3-6 μm in lenght and 0.6-0.8 μm in width.
  • These cells posses metachromatic granules.
  • Mode of multiplication is by binary fission.

2. Cultural characters

  • Corynebacterium can grow easily on ordinary media.
  • It growth is enhanced by addition of blood or serum in the media.
  • It grows in a temperature range of 15° C-40° C and optimum temperature for its growth is 36° C.
  • Neutral pH is optimum for its growth.
  • Corynebacteria diphtheriae may be aerobic or facultative anaerobic in nature.
  • They are fast growing organism.

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