Mycobacterium angelicum
Taxonomy
Morphology
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Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium,
Mycobacterium angelicum Pourahmad et al. 2015.
Acid-fast rods. Non-motile. Non-spore-forming.
Colonies are 3-4 mm in diameter, smooth and milky white in the light and in the dark.
Visible growth appears after 2 weeks of incubation at 25-37 ºC. No growth at 42  ºC.
No growth on MacConkey agar without crystal violet or on media supplemented with
5% NaCl.
Undetermined. One strain was isolated from a patient with type II respiratory failure.
Isolated from a freshwater angelfish (Pterophyllum scalare) in Slovenia. One strain was isolated from human bronchoalveolar lavage.
Susceptible to amikacin, clarithromycin, ethambutol, linezolid, moxifloxacin, rifabutin, hydroxylamine, isoniazid and p-nitrobenzoic
acid. Resistant to thiacetazone.
  1. Pourahmad F, Pate M, Ocepek M, Borroni E, Cabibbe AM, Capitolo E, Cittaro D, Frizzera E, Jencic V, Mariottini A, et al.
    Mycobacterium angelicum sp. nov., a non-chromogenic, slow-growing species isolated from fish and related to Mycobacterium
    szulgai. Int J Syst Evol Microbiol 2015; 65:4724-4729.
  2. E. Davies, J. Wieboldt, T. Stanley, Y. Maeda, M. Smyth, S. Stanley, M. Mcclean, W. Evans, C. Funston, B. C. Millar, C. E. Goldsmith &
    J. E. Moore (2012) Isolation and identification of ‘Mycobacterium angelicum’ from a patient with type II respiratory failure:
    suggested reporting guidelines to molecular clinical laboratories, British Journal of Biomedical Science, 69:3, 134-136, DOI:
    10.1080/09674845.2012.12069140.
Positive results for semi-quantitative catalase (>45 mm foam), nitrate reduction, tellurite reduction, and urease.

Negative results for thermostable catalase (68 ºC), beta-glucosidase, niacin accumulation, and Tween 80 hydrolysis.
(c) Costin Stoica
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