Mycobacterium

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Related to Mycobacterium marinum: Mycobacterium chelonae, Mycobacterium ulcerans

Mycobacterium

 

a genus of bacteria, related to actinomycetes; it differs from true bacteria in a number of ways. The young vegetative cells are rodlike (0.5–0.8 × 2.2 microns); they are capable of branching and acquiring V or Y shapes. In old cultures spherical cells predominate. Mycobacteria, which do not form endospores, are nonmotile, gram-positive, and strictly aerobic. They reproduce mainly by dividing and budding. Mycobacteria contain carotenoids, and, as a result, their colonies are often pigmented (yellow, orange, or red). Owing to their cell composition (including lipides and wax), some myco-bacteria, in contrast to other bacteria, are acid-fast.

Mycobacteria are widely distributed in soils and are active in the mineralization of plant remains. Some species of Mycobacterium are nitrogen-fixing microorganisms; others are capable of metabolizing the carbohydrates of petroleum and natural gas and, when cultured, accumulate protein, which is used for fodder and other purposes. Some species of Mycobacterium are pathogenic to humans (for example, mycobacteria are the causative agents of tuberculosis and leprosy).

A. A. IMSHENETSKII

References in periodicals archive ?
Key words: mycobacteriosis, Mycobacterium marinum, avian, blue-fronted Amazon parrot, Amazona aestiva
Hurst LC, Amadio PC, Badalamente MA, et al: Mycobacterium marinum infections of the hand.
Osteomyelitis and synovitis produced by Mycobacterium marinum in a fisherman.
VIGAMOX(TM) solution will now have an additional 22 pathogens added to the in vitro efficacy section of its package insert, including atypical mycobacteria (Mycobacterium avium, Mycobacterium marinum, and Propionibacterium acnes).
Evolution of Mycobacterium ulcerans and other mycolactone-producing mycobacteria from a common Mycobacterium marinum progenitor.
Using one such method, California scientists have screened about a quarter of the genome of Mycobacterium marinum, the cause of tuberculosis in fish and frogs, and found several genes that are active when the bacteria are grown in macrophages.
Comparative genetic analysis of Mycobacterium ulcerans and Mycobacterium marinum reveals evidence of recent divergence.
Tuberculin skin testing and in vitro T cell responses to ESAT-6 and culture filtrate protein 10 after infection with Mycobacterium marinum or M.
Characterization of an unusual Mycobacterium: a possible missing link between Mycobacterium marinum and Mycobacterium ulcerans.
Genotyping Mycobacterium ulcerans and Mycobacterium marinum using mycobacterial interspersed repetitive units.
To the Editor: Mycobacterium marinum infections, commonly known as fish tank granuloma, produce nodular or ulcerating skin lesions on the extremities of healthy hosts.

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