Mycobacterium fallax
Species of bacterium
Mycobacterium fallax | |
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Scientific classification ![]() | |
Domain: | Bacteria |
Phylum: | Actinomycetota |
Class: | Actinomycetia |
Order: | Mycobacteriales |
Family: | Mycobacteriaceae |
Genus: | Mycobacterium |
Species: | M. fallax |
Binomial name | |
Mycobacterium fallax Lévy-Frébault, V. et al. 1983,[1] ATCC 35219 |
Mycobacterium fallax is a species of the phylum Actinomycetota (Gram-positive bacteria with high guanine and cytosine content, one of the dominant phyla of all bacteria), belonging to the genus Mycobacterium.
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 at 30 °C, but not at 37 °C, on Löwenstein-Jensen or Middlebrook 7H10 media.[1]
- 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
- ^ a b Lévy-Frébault, V. et al. 1983. Mycobacterium fallax sp. nov. Int. J. Syst. Bacteriol., 1983, 33, 336-343.
External links
- Type strain of Mycobacterium fallax at BacDive - the Bacterial Diversity Metadatabase
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Mycobacteria (including Nontuberculous)
(R1P=photochromogenic;
R2S=scotochromogenic;
R3N=nonchromogenic)
Long helix 18 (TKHGC) |
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Long helix 18 (other) |
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Short helix 18 |
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Ungrouped |
Runyon IV
M. neoaurum group | |||||
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F/T groups |
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M. smegmatis group | |||||
M. chelonae group | |||||
M. elephantis group |
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