Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium koreense Kim et al. 2012.
Acid-alcohol-fast rods, frequently curved. Spores or filaments are not produced.
Microcolonies develop in about 1 week. Colonies grown on Middlebrook 7H10 agar
medium are rough or smooth and not pigmented. Grows at 25 ºC, but not at 45 ºC
(optimally at 37 ºC). Can grow in 5% (w/v) NaCl media and on MacConkey agar without
Isolated from human sputum. Resistant to thiophen-2-carboxylic acid hydrazide TCH (10 μg/ml), and para-nitrobenzoic acid PNB (500
μg/ml). Susceptible to ethambutol (5 μg/ml).
- Kim BJ, Jeong J, Lee SH, Kim SR, Yu HK, Park YG, Kim KJ, Kook YH, Kim BJ. Mycobacterium koreense sp. nov., a slowly growing
non-chromogenic species closely related to Mycobacterium triviale. Int J Syst Evol Microbiol 2012; 62:1289-1295.
- Kim BJ, Hong SH, Yu HK, Park YG, Jeong J, Lee SH, Kim SR, Kim K, Kook YH, Kim BJ. Mycobacterium parakoreense sp. nov., a
slowly growing non-chromogenic species related to Mycobacterium koreense, isolated from a human clinical specimen. Int J Syst
Evol Microbiol 2013; 63:2301-2308.
Positive results for arylsulfatase (14 days), heat-stable catalase, pyrazinamidase, and Tween 80 hydrolysis.
Negative results for arylsulfatase (3 days), niacin accumulation, nitrate reductase, tellurite reductase, and urease.
(c) Costin Stoica