Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium senuense Mun et al. 2008.
Member of the Mycobacterium terrae complex.
Acid-alcohol-fast, rod-shaped cells, frequently bent. Spores and filaments are
Colonies on Middlebrook 7H10 agar are usually rough and produce no pigmentation
under both dark and light conditions. Cells on Lowenstein-Jensen medium grow in a
film-like manner and produce no pigmentation. On Middlebrook 7H10 medium,
mature growth develops in 4 weeks at 25 and 37 ºC. Microcolonies develop in 3
weeks at the same temperature. However, 5 weeks or more is required to form
mature colonies on L-J medium. The optimal growth temperature is 37 ºC. No growth
at 45 ºC. No growth on MacConkey agar without crystal violet, on culture medium
containing 5% NaCl or picric acid (2%).
Isolated from sputum samples in Seoul, Korea.
Susceptible to ethambutol at 500 μg/ml. Resistant to thiophene-2-carboxylic acid hydrazide (10 μg/ml)
- Mun HS, Park JH, Kim H, Yu HK, Park YG, Cha CY, Kook YH, Kim BJ. Mycobacterium senuense sp. nov., a slowly growing, non-
chromogenic species closely related to the Mycobacterium terrae complex. Int J Syst Evol Microbiol 2008; 58:641-646.
- Stephen Berger 2019. GIDEON Guide to Medically Important Bacteria, eBook.
Positive results for nitrate reduction, heat-stable catalase (68 ºC), pyrazinamidase, tellurite reduction, and Tween 80 hydrolysis.
Negative results for arylsulfatase (3 and 14 days), iron uptake, niacin accumulation, and urease.
(c) Costin Stoica