- Mycobacterium flavescens
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Mycobacterium flavescens Scientific classification Kingdom: Bacteria Phylum: Actinobacteria Order: Actinomycetales Suborder: Corynebacterineae Family: Mycobacteriaceae Genus: Mycobacterium Species: M. flavescens Binomial name Mycobacterium flavescens
Bojalil et al. 1962, ATCC 14474Mycobacterium flavescens
Etymology: Latin, flavescens = becoming golden yellow.Contents
Description
Gram-positive, nonmotile and acid-fast rods.
Colony characteristics
- Soft, yellow-orange scotochromogenic, butyrous colonies.
Physiology
- Slow growth on Löwenstein-Jensen medium at 25-37°C, but not at 45 °C within 7–10 days.
- Although growth rate is intermediate, metabolic and physiologic properties are more like rapidly growing species.
Differential characteristics
- Serologic specificity demonstrated by immunodiffusion.
- Related to Mycobacterium fortuitum: can be distinguished by its intense pigment production, and its slow rate of growth.
Pathogenesis
Not associated with disease. Biosafety level 2.
Type strain
- Normal human flora, environmental habitat.
- First isolated from a drug treated tuberculous guinea pig (Mexico).
Strain ATCC 14474 = CCUG 29041 = CIP 104533 = DSM 43991 = JCM 12274 = NCTC 10271 = NRRL B-4038.
References
- Bojalil et al. 1962. Adansonian classification of mycobacteria. Journal of General Microbiology, 28, 333-346.]
Slowly growing
(R1P=photochromogenic;
R2S=scotochromogenic;
R3N=nonchromogenic)Rapidly growing/
Runyon IVM. neoaurum groupF/T groupsM. fortuitum groupM. vaccae groupM. smegmatis groupM. chelonae groupM. elephantis group
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