Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium rhodesiae (ex Tsukamura 1971) Tsukamura 1981.
Acid-fast short rods, below 2 μm. Prolonged culture may lose some acid-fastness.
Mycelium is not formed. No cord formation.
Dilute inocula on egg and agar media yield brilliant yellow, smooth, moist colonies
after incubation for less than 5 days. Grows at 25-37 ºC, but not at 45 or 52 ºC.
Isolated from putum samples from Rhodesian patients suspected to have tuberculosis. Susceptible to hydroxylamine (500 μg/ml),
ethambutol (5 μg/ml), viomycin, kanamycin, and capreomycin. Resistant to thiophene-2-carboxylic acid hydrazide (1 μg/ml), rifampin
(25 μg/ml), isoniazid, streptomycin, ethionamide, and cycloserine.
No demonstrable virulence for chickens, guinea pigs, mice, rabbits or humans.
- 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.
- Tsukamura M, Mizuno S, Tsukamura S. Numerical analysis of rapidly growing, scotochromogenic mycobacteria, including
Mycobacterium obuense sp. nov., nom. rev., Mycobacterium rhodesiae sp. nov., nom. rev., Mycobacterium aichiense sp. nov.,
nom. rev., Mycobacterium chubuense sp. nov., nom. rev., and Mycobacterium tokaiense sp. nov., nom. rev. Int. J. Syst. Bacteriol.
- Casal M, Calero JR. Mycobacterium gadium sp. nov. a new species of rapid-growing scotochromogenic mycobacteria. Tubercle
Positive results for acid phosphatase, arylsulfatase (3 and 7 days), catalase, semiquantitative catalase test, pyrazinamidase, Tween
80 hydrolysis, and urease.
Can utilize as sole carbon source acetate, succinate, malate, fumarate, fructose, glucose, pyruvate, and ethanol.
Negative results for alpha-esterase, beta-esterase, beta-galactosidase, niacin production, nitrate reduction, nicotinamidase,
acetamidase, benzamidase, isonicotinamidase, alantoinase, sucinamidase, and salicylamidase.
No utilization of acetamide, benzoate, citrate (same ATCC 27042 strain was positive in Casal's study - admin note), sorbitol, and
(c) Costin Stoica