Mycobacterium tusciae: Difference between revisions
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'''''Mycobacterium tusciae''''' is a slow-growing, scotochromogenic mycobacterium first isolated from a lymph node of an immunocompromised child and subsequently from tap water and from a respiratory specimen of a patient with chronic fibrosis. |
'''''Mycobacterium tusciae''''' is a slow-growing, scotochromogenic [[mycobacterium]] first isolated from a lymph node of an immunocompromised child and subsequently from tap water and from a respiratory specimen of a patient with chronic fibrosis. |
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[[Etymology]]: tusciae referring to the Italian region of Tuscany, where the organisms were first isolated. |
[[Etymology]]: tusciae referring to the Italian region of Tuscany, where the organisms were first isolated. |
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Revision as of 20:11, 6 May 2007
Mycobacterium tusciae | |
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Scientific classification | |
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Species: | M. tusciae
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Binomial name | |
Mycobacterium tusciae Tortoli et al. 1999, DSM 44338
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Mycobacterium tusciae is a slow-growing, scotochromogenic mycobacterium first isolated from a lymph node of an immunocompromised child and subsequently from tap water and from a respiratory specimen of a patient with chronic fibrosis. Etymology: tusciae referring to the Italian region of Tuscany, where the organisms were first isolated.
Description
Microscopy
- Gram-positive, nonmotile and acid-fast rods.
- Early microscopic morphology on Middlebrook 7H11 agar is characterized by a very elevated centre surrounded by an uneven flat fringe.
Colony characteristics
- Colonies are rough and strongly yellow-pigmented.
Physiology
- Slow growth on Löwenstein-Jensen medium at temperatures between 25°C and 32°C within 4 weeks.
- Growth at 37°C is inconsistent and requires longer incubation.
- No growth at 42°C and on MacConkey agar.
- The type strain is susceptible in vitro to ciprofloxacin, clarithromycin, rifabutin, rifampicin, sparfloxacin and streptomycin.
Differential characteristics
- Closely related to Mycobacterium aichiense and Mycobacterium farcinogenes, rapidly-growing mycobacteria, by evaluation of 16S rDNA sequences.
Pathogenesis
- Probably an opportunistic pathogen. First isolated from a lymph node of a immunocompromised child and subsequently from tap water and from a respiratory specimen of a patient with chronic fibrosis.
Type Strain
- Strain FI-25796 = CCUG 50996 = CIP 106367 = DSM 44338 = JCM 12692.
References
- Tortoli E., 1999. Mycobacterium tusciae sp. nov. Int. J. Syst. Bacteriol., 49, 1839-1844.