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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.
[[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.



Revision as of 20:11, 6 May 2007

Mycobacterium tusciae
Scientific classification
Kingdom:
Phylum:
Order:
Suborder:
Family:
Genus:
Species:
M. tusciae
Binomial name
Mycobacterium tusciae
Tortoli et al. 1999, DSM 44338

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


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.