| Mycobacterium celatum |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium celatum Butler et al. 1993.
Mycobacterium, Mycobacterium celatum Butler et al. 1993.
Acid-alcohol fast, slender rods with occasional coccoidal forms (0.25-0.5 x 0.5-13.0
µm). Does not form cords or branches.
µm). Does not form cords or branches.
Mature colonies are polymorphic, usually small, smooth, domeshaped, and either
non-pigmented or pale yellow in older cultures. Flat and transparent colonies occur
infrequently. Grows on Lowenstein-Jensen (L-J) medium at 33, 37, and 42 °C in 3
to 5 weeks. Dysgonic growth occurs at 27,30, and especially 45°C. Comparable
results are found on 7H10 agar medium at these temperatures, but growth is
visible in 1 week. Nonphotochromogenic. Does not grow on Lowenstein-Jensen
medium containing 5% NaCl or on MacConkey agar without crystal violet.
non-pigmented or pale yellow in older cultures. Flat and transparent colonies occur
infrequently. Grows on Lowenstein-Jensen (L-J) medium at 33, 37, and 42 °C in 3
to 5 weeks. Dysgonic growth occurs at 27,30, and especially 45°C. Comparable
results are found on 7H10 agar medium at these temperatures, but growth is
visible in 1 week. Nonphotochromogenic. Does not grow on Lowenstein-Jensen
medium containing 5% NaCl or on MacConkey agar without crystal violet.
Isolated from sputum produced by a 74-year-old human female and from a bronchial wash specimen from a 47-year-old human male.
Resistant to thiophen-2-carboxylic acid hydrazide (T2H). Susceptible to a high concentration of streptomycin (10.0 µg/ml) and
capreomycin. Variable susceptibility to rifabutin.
Resistant to thiophen-2-carboxylic acid hydrazide (T2H). Susceptible to a high concentration of streptomycin (10.0 µg/ml) and
capreomycin. Variable susceptibility to rifabutin.
May cause respiratory infections.
- Butler W.R., O'Connor S.P., Yakrus M.A., Smithwick R.W., Plikaytis B.B., Moss C.W., Floyd M.M., Woodley C.L., Kilburn J.O., Vadney
F.S. and Gross W.M.: Mycobacterium celatum sp. nov. Int. J. Syst. Bacteriol., 1993, 43, 539-548. - 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.+Loredana Gabriela Popa,
Mircea Ioan Popa 2009. Identificarea bacililior acido-rezistenti in: Tratat de microbiologie clinica, Dumitru Buiuc, Marian Negut, ed.
a III-a, Editura Medicala, 881-890, ISBN (13) 978-973-39-0593-6.
Positive results for arylsulfatase (3- and 14-days), heat-stable catalase, pyrazinamidase and tellurite reduction.
Negative results for semiquantitative catalase test, niacin production, nitrate reduction, Tween hydrolysis and urease.
Negative results for semiquantitative catalase test, niacin production, nitrate reduction, Tween hydrolysis and urease.
(c) Costin Stoica
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