| Mycobacterium confluentis |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium confluentis Kirschner et al. 1992.
Species description is based on a single isolated strain.
Mycobacterium, Mycobacterium confluentis Kirschner et al. 1992.
Species description is based on a single isolated strain.
Acid-alcohol-fast coccobacilli (0.5-0.8 by 0.7-1.7 μm). Does not form spores, capsules,
or aerial hyphae.
or aerial hyphae.
Colonies on Lowenstein–Jensen medium after 2-4 days incubation are colorless,
smooth, and 3-5 mm in diameter. A dark pigmentation, not dependent on light, may
be observed after prolonged culture (8-12 weeks). Growth occurs at 22-41 ºC;
optimum growth occurs at 31-37 ºC. Do not grow at 42 or 45 ºC. No growth in 5% (w/v)
NaCl media.
smooth, and 3-5 mm in diameter. A dark pigmentation, not dependent on light, may
be observed after prolonged culture (8-12 weeks). Growth occurs at 22-41 ºC;
optimum growth occurs at 31-37 ºC. Do not grow at 42 or 45 ºC. No growth in 5% (w/v)
NaCl media.
Undetermined.
Isolated from a sputum specimen obtained from a healthy male.
Susceptible to isoniazid (0.25 μg/ml), streptomycin (4.0 μg/ml), and ethambutol (1.0 μg/ml).
Susceptible to isoniazid (0.25 μg/ml), streptomycin (4.0 μg/ml), and ethambutol (1.0 μg/ml).
- Kirschner P, Teske A, Schroder KH, Kroppenstedt RM, Wolters J, Bottger EC. Mycobacterium confluentis sp. nov. Int J Syst
Bacteriol 1992; 42:257-262. - 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. - Enrico Tortoli. Impact of Genotypic Studies on Mycobacterial Taxonomy: the New Mycobacteria of the 1990s. Clinical Microbiology
Reviews, Apr. 2003, p. 319-354.
Positive results for acid phosphatase, alpha-esterase (weak), acetamidase, catalase, semiquantitative catalase (>45 mm),
thermostable catalase (68 ºC), nitrate reductase, nicotinamidase, pyrazinamidase, and urease.
Negative results for arylsulfatase (3 and 10 days), beta-esterase, benzamidase, iron uptake, isonicotinamidase, succinidamidase,
niacin accumulation, and Tween hydrolysis.
thermostable catalase (68 ºC), nitrate reductase, nicotinamidase, pyrazinamidase, and urease.
Negative results for arylsulfatase (3 and 10 days), beta-esterase, benzamidase, iron uptake, isonicotinamidase, succinidamidase,
niacin accumulation, and Tween hydrolysis.
(c) Costin Stoica
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