| Mycobacterium kubicae |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium kubicae Floyd et al. 2000.
Member of the Mycobacterium simiae complex.
Mycobacterium, Mycobacterium kubicae Floyd et al. 2000.
Member of the Mycobacterium simiae complex.
Strong acid-alcohol-fast rods, frequently bent with occasional coccoid forms (0.25-7.0
x 0.25-0.5 μm. No branching or aerial mycelia production.
x 0.25-0.5 μm. No branching or aerial mycelia production.
Colonies on Lowenstein-Jensen and Middlebrook 7H11 agar, after 3-4 weeks
incubation, are yellow-colored and scotochromogenic. Smooth, domed growth occurs
on Middlebrook agar and film-like growth is seen on Lowenstein-Jensen medium.
Temperature range for growth is 28-37 ºC on Middlebrook agar, but for most isolates
is confined to 33-37 ºC on Lowenstein-Jensen medium. Does not grow at 42 ºC.
incubation, are yellow-colored and scotochromogenic. Smooth, domed growth occurs
on Middlebrook agar and film-like growth is seen on Lowenstein-Jensen medium.
Temperature range for growth is 28-37 ºC on Middlebrook agar, but for most isolates
is confined to 33-37 ºC on Lowenstein-Jensen medium. Does not grow at 42 ºC.
Isolated from sputum, from bronchial washings and other sources.
Susceptible to isoniazid (1 µg/ml), ethambutol (10 µg/ml). Resistant to streptomycin (8 µg/ml).
Susceptible to isoniazid (1 µg/ml), ethambutol (10 µg/ml). Resistant to streptomycin (8 µg/ml).
Potentially pathogenic.
- John G. Magee and Alan C. Ward 2012. Family III. Mycobacteriaceae Chester 1897, 63AL in Bergey’s Manual of Systematic
Bacteriology, Volume Five The Actinobacteria, Part A, Michael Goodfellow & al. (editors), 312-375. - Floyd MM, Gross WM, Bonato DA, Silcox VA, Smithwick RW, Metchock B, Crawford JT, Butler WR. Mycobacterium kubicae sp. nov.,
a slowly growing, scotochromogenic Mycobacterium. Int J Syst Evol Microbiol 2000; 50:1811-1816.
Positive results for semi-quantitative catalase, and Tween 80 hydrolysis (contradictory results in Floyd's original paper - admin note).
Negative results for arylsulfatase (3 days), nitrate reduction, and urease.
Variable results for arylsulfatase.
Negative results for arylsulfatase (3 days), nitrate reduction, and urease.
Variable results for arylsulfatase.
(c) Costin Stoica
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