| Mycobacterium lentiflavum |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium lentiflavum Springer et al. 1996.
Member of the Mycobacterium simiae complex.
Mycobacterium, Mycobacterium lentiflavum Springer et al. 1996.
Member of the Mycobacterium simiae complex.
Acid-alcohol-fast coccobacilli. Does not produce cords, aerial hyphae, capsules, or
spores.
spores.
Colonies on Lowenstein-Jensen medium are smooth, 1-2 mm in diameter,
and show bright yellow pigmentation. Scotochromogenic. Visible growth from dilute
inocula appears in 3-4 weeks. Temperature range for growth is 22-37 ºC; does not
grow at 42-45 ºC. Does not grow on MacConkey agar w/o crystal violet or on media
supplemented with 5% (w/v) NaCl.
and show bright yellow pigmentation. Scotochromogenic. Visible growth from dilute
inocula appears in 3-4 weeks. Temperature range for growth is 22-37 ºC; does not
grow at 42-45 ºC. Does not grow on MacConkey agar w/o crystal violet or on media
supplemented with 5% (w/v) NaCl.
Isolated from clinical samples - gastric lavage, sputum, urine, biopsy from vertebrae from a patient with spondylodiscitis (type strain).
Resistant to thiophen-2-carboxylic acid hydrazide (5.0 μg/ml), rifampin (6.0 μg/ml), isoniazid (1 μg/ml), ethambutol (2 μg/ml), and
streptomycin (8 μg/ml).
Resistant to thiophen-2-carboxylic acid hydrazide (5.0 μg/ml), rifampin (6.0 μg/ml), isoniazid (1 μg/ml), ethambutol (2 μg/ml), and
streptomycin (8 μg/ml).
Has been identified as the cause of cervical lymphadenitis in a child.
- 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. - Piersimoni C, Zitti P, Mazzarelli G, Mariottini A, Nista D, Zallocco D. Mycobacterium triplex pulmonary disease in
immunocompetent host. Emerg Infect Dis. 2004;10(10):1859–1862. doi:10.3201/eid1010.040217. - Springer B, Wu WK, Bodmer T, Haase G, Pfyffer GE, Kroppenstedt RM, Schroder KH, Emler S, Kilburn JO, Kirschner P, et al.
Isolation and characterization of a unique group of slowly growing mycobacteria: description of Mycobacterium lentiflavum sp. nov.
J Clin Microbiol 1996; 34:1100-1107. - Koksalan OK, Aydin MD, Eraslan S, Bekiroglu N. Reliability of cord formation in BACTEC 12B/13A media for presumptive
identification of Mycobacterium tuberculosis complex in laboratories with a high prevalence of Mycobacterium tuberculosis. Eur J
Clin Microbiol Infect Dis. 2002;21(4):314‐317. doi:10.1007/s10096-002-0701-9.
Positive results for heat-stable catalase (68 ºC).
Negative results for arylsulphatase (3, 7, and 10 days), beta-galactosidase, niacin accumulation, nitrate reduction, tellurite reduction,
Tween 80 hydrolysis, and urea hydrolysis.
Variable results for semiquantitative catalase test, and pyrazinamidase.
Negative results for arylsulphatase (3, 7, and 10 days), beta-galactosidase, niacin accumulation, nitrate reduction, tellurite reduction,
Tween 80 hydrolysis, and urea hydrolysis.
Variable results for semiquantitative catalase test, and pyrazinamidase.
(c) Costin Stoica
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