| Mycobacterium houstonense |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium houstonense Schinsky et al. 2004.
Synonym: Mycobacterium fortuitum biovar III.
Member of the Mycobacterium fortuitum complex.
Mycobacterium, Mycobacterium houstonense Schinsky et al. 2004.
Synonym: Mycobacterium fortuitum biovar III.
Member of the Mycobacterium fortuitum complex.
Acid-fast, pleomorphic rods. Long filamentous forms are often observed. No spores,
capsules or aerial hyphae are present. Gram-positive.
capsules or aerial hyphae are present. Gram-positive.
Colonies are mucoid, convex, round and entire-edged. Grow on Lowenstein-Jensen
medium at 35 and 42 ºC in less than 7 days. Colonies after incubation on heart
infusion agar with 5 % (v/v) rabbit blood for 2 days at 35 ºC are white to slightly beige,
small-diameter (approx. 1 mm). Grows on 5% (w/v) NaCl or on MacConkey agar
without crystal violet. No growth in lysozyme.
medium at 35 and 42 ºC in less than 7 days. Colonies after incubation on heart
infusion agar with 5 % (v/v) rabbit blood for 2 days at 35 ºC are white to slightly beige,
small-diameter (approx. 1 mm). Grows on 5% (w/v) NaCl or on MacConkey agar
without crystal violet. No growth in lysozyme.
The type strain was isolated from a face wound.
Resistant to thiophene-2-carboxylic hydrazide, ampicillin, cefotaxime, ceftriaxone, doxycycline, erythromycin, minocycline and
vancomycin. Susceptible to amikacin, amoxycillin/clavulanate, ciprofloxacin, imipenem, sulfamethoxazole and trimethoprim +
sulfamethoxazole.
Resistant to thiophene-2-carboxylic hydrazide, ampicillin, cefotaxime, ceftriaxone, doxycycline, erythromycin, minocycline and
vancomycin. Susceptible to amikacin, amoxycillin/clavulanate, ciprofloxacin, imipenem, sulfamethoxazole and trimethoprim +
sulfamethoxazole.
Nontuberculous infections.
- Schinsky MF, Morey RE, Steigerwalt AG, Douglas MP, Wilson RW, Floyd MM, Butler WR, Daneshvar MI, Brown-Elliott BA, Wallace
RJJ, et al. Taxonomic variation in the Mycobacterium fortuitum third biovariant complex: description of Mycobacterium boenickei
sp. nov., Mycobacterium houstonense sp. nov., Mycobacterium neworleansense sp. nov. and Mycobacterium brisbanense sp.
nov. and recognition of Mycobacterium porcinum from human clinical isolates. Int J Syst Evol Microbiol 2004; 54:1653-1667. - 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. - Shojaei H, Daley C, Gitti Z, Hashemi A, Heidarieh P, Moore ER, Naser AD, Russo C, van Ingen J, Tortoli E. Mycobacterium
iranicum sp. nov., a rapidly growing scotochromogenic species isolated from clinical specimens on three different continents. Int
J Syst Evol Microbiol 2013; 63:1383-1389. - Lamy B, Marchandin H, Hamitouche K, Laurent F. Mycobacterium setense sp. nov., a Mycobacterium fortuitum-group organism
isolated from a patient with soft tissue infection and osteitis. Int J Syst Evol Microbiol 2008; 58:486-490.
Positive results for arylsulfatase (3 and 10 days), thermostable catalase (68 ºC), iron uptake, nitrate reduction, pyrazinamidase, and
urease (the type strain is negative in Shojaei’s study).
Acid is produced oxidatively from D-fructose, D-glucose, imyo-inositol, D-mannitol, D-mannose, D-sorbitol and D-trehalose
Can utilize acetamide, D-fructose, D-glucose, i-myo-inositol, D-mannitol, D-mannose, D-sorbitol and D-trehalose.
Negative results for semi-quantitative catalase test (<45 mm), niacin accumulation, and Tween 80 hydrolysis.
Acid is not produced from adonitol, L-arabinose, cellobiose, dulcitol, i-erythritol, D-galactose, glycerol, lactose, maltose, melibiose,
raffinose, L-rhamnose, salicin, starch, sucrose or D-xylose.
No utilization of citrate, adonitol, L-arabinose, cellobiose, dulcitol, i-erythritol, D-galactose, glycerol, lactose, maltose, melibiose,
raffinose, L-rhamnose, salicin, starch, sucrose and D-xylose.
urease (the type strain is negative in Shojaei’s study).
Acid is produced oxidatively from D-fructose, D-glucose, imyo-inositol, D-mannitol, D-mannose, D-sorbitol and D-trehalose
Can utilize acetamide, D-fructose, D-glucose, i-myo-inositol, D-mannitol, D-mannose, D-sorbitol and D-trehalose.
Negative results for semi-quantitative catalase test (<45 mm), niacin accumulation, and Tween 80 hydrolysis.
Acid is not produced from adonitol, L-arabinose, cellobiose, dulcitol, i-erythritol, D-galactose, glycerol, lactose, maltose, melibiose,
raffinose, L-rhamnose, salicin, starch, sucrose or D-xylose.
No utilization of citrate, adonitol, L-arabinose, cellobiose, dulcitol, i-erythritol, D-galactose, glycerol, lactose, maltose, melibiose,
raffinose, L-rhamnose, salicin, starch, sucrose and D-xylose.
(c) Costin Stoica
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