Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium iranicum Shojaei et al. 2013.
Acid-alcohol-fast rods. Gram-positive. Non-motile. Spores are not produced.
Colonies are smooth, orange and scotochromogenic,1-4 mm in diameter after 4 days
incubation at 37 ºC. Growth occurs at temperatures between 25 and 40 ºC (optimally
at 37 ºC). Can grow on 5% (w/v) NaCl, but not on MacConkey agar without crystal
Isolated from sputum (4 strains), bronchoalveolar lavage (1), cerebrospinal fluid (2) and hand wound (1) in Iran, Italy,Greece, the
Netherlands, Sweden and the USA.
Resistant to thiophen-2-carboxylic acid hydrazide (TCH). Susceptible to amikacin, cefoxitin, clarithromycin, ethambutol, minocycline,
imipenem, linezolid and sulfamethoxazole.
- Shojaei H, Daley C, Gitti Z, Hashemi A, Heidarieh P, Moore ER, Naser AD, Russo C, van Ingen J, Tortoli E. Mycobacterium
iranicum sp. nov., a rapidly growing scotochromogenic species isolated from clinical specimens on three different continents. Int
J Syst Evol Microbiol 2013; 63:1383-1389.
Positive results for arylsulfatase (3 days), heat-stable catalase (68 ºC), beta-glucosidase, iron uptake, tellurite reduction, and urease.
Negative results for semiquantitative catalase test, nitrate reduction, niacin accumulation, pyrazinamidase, and Tween 80 hydrolysis.
(c) Costin Stoica