Suvarna Garge (Editor)

Mycobacterium fallax

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Kingdom
  
Bacteria

Order
  
Actinomycetales

Family
  
Mycobacteriaceae

Scientific name
  
Mycobacterium fallax

Phylum
  
Actinobacteria

Suborder
  
Corynebacterineae

Genus
  
Mycobacterium

Rank
  
Species

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Mycobacterium fallax 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 acid-fast rods (0.5 – 1 µm long) except for a small number (less than 20%) of cyanophil forms.

Colony characteristics

  • Large, eugonic, buff coloured and rough colonies (Löwenstein-Jensen medium at 30°C).
  • Cauliflower-like morphology, resembling M. tuberculosis colonies. Cord formation at the edges of colonies (Middlebrook 7H10 agar at 30°C).

    • Physiology

  • Rapid growth on Löwenstein-Jensen or Middlebrook 7H10 media.
  • Susceptible to ethambutol, rifampin and kanamycin.
  • Resistant to isoniazid, pyrazinamide and streptomycin.

    • Differential characteristics

  • Similarities to M. tuberculosis include colony morphology, thermolabile catalase, positive nitrate reductase; differences are negative reactions for niacin production and rapid growth at 30°C.

    • Pathogenesis

  • Not known. Biosafety level 1.

    • Type strain

  • Isolated from environmental sources in France and the former Czechoslovakia. Strain ATCC 35219 = CCUG 37584 = CIP 81.39 = DSM 44179 = JCM 6405.

    • References

    Mycobacterium fallax Wikipedia
    (Text) CC BY-SA