Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium celeriflavum Shahraki et al. 2015.
Acid-alcohol-fast rods. Gram-positive. Non-motile. Non-sporeforming.
Colonies on Lowenstein-Jensen medium develop in 5-7 days at 25-37 ºC, are rough,
and produce yellow pigment both in the light and in the dark. Growth is slower at 30
ºC and is absent at 42 ºC. No growth on MacConkey agar without crystal violet.
Isolated from pulmonary specimens.
Susceptible to p-nitrobenzoate (500 μg/ml), hydroxylamine (500 μg/ml) or isoniazid (1 μg/ml). Resistant to thiacetazone (10 μg/ml).
- Shahraki AH, Cavusoglu C, Borroni E, Heidarieh P, Koksalan OK, Cabibbe AM, Hashemzadeh M, Mariottini A, Mostafavi E, Cittaro
D, et al. Mycobacterium celeriflavum sp. nov., a rapidly growing scotochromogenic bacterium isolated from clinical specimens. Int
J Syst Evol Microbiol 2015; 65:510-515.
Positive results for nitrate reduction, tellurite reduction, thermostable catalase (68 ºC).
Negative results for niacin accumulation, beta-glucosidase, and Tween 80 hydrolysis.
Variable results for semi-quantitative catalase test and urease.
(c) Costin Stoica