Suvarna Garge (Editor)

Mycobacterium cookii

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Kingdom
  
Bacteria

Order
  
Actinomycetales

Family
  
Mycobacteriaceae

Scientific name
  
Mycobacterium cookii

Phylum
  
Actinobacteria

Suborder
  
Corynebacterineae

Genus
  
Mycobacterium

Rank
  
Species

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Mycobacterium cookii is a species of the phylum actinobacteria (Gram-positive bacteria with high guanine and cytosine content, one of the dominant phyla of all bacteria), belonging to the genus mycobacterium.

Contents

Description

Gram-positive, nonmotile and polymorphic acid-fast rods (0.8 µm x 1.4–1.9 µm). Forms clumps, but not cords or cross bands. Does not form spores, capsules and aerial hyphae.

Colony characteristics

  • Colonies are smooth and glistening with yellow-orange pigmentation (0.5–1.0 mm diameter, scotochromogenic).

    • Physiology

  • Slow growth on Löwenstein-Jensen medium or Middlebrook 7H10 agar at 31°C (optimal temperature). No growth at 37°C, 42°C or 45°C.
  • Most of the strains are susceptible to ethambutol, isoniazid, streptomycin, and rifampin.

    • Differential characteristics

  • Phylogenetic position between the slowly growing pathogenic species and the saprotrophic rapidly growing species by partial 16S rDNA sequencing.

    • Pathogenesis

  • Not pathogenic for humans, mice, guinea pigs and rabbits. Biosafety level 1.
  • Provokes a non-specific hypersensitivity reaction to bovine tuberculin.

    • Type strain

    Strain NZ2 = ATCC 49103 = CIP 105396 = DSM 43922 = JCM 12404.

    References

    Mycobacterium cookii Wikipedia
    (Text) CC BY-SA