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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).


References in periodicals archive ?
Recurrent therapy resistant mastoiditis by Mycobacterium cheilonaeabscessus, a nontuberculous mycobacterium.
26, 2015 /PRNewswire-USNewswire/ -- The Pennsylvania Department of Health today released details of a recent investigation into a cluster of Nontuberculous Mycobacterium (NTM) infections involving patients who had open heart surgeries requiring cardiopulmonary bypass at WellSpan York Hospital.
A nontuberculous mycobacterium strain was isolated by culture and preliminarily identified as M.
Vertebral osteomyelitis due to infection with nontuberculous Mycobacterium species after blunt trauma to the back: Three examples of the principle of locus minoris resistentiac.
Pink Sheets: NNLX) to include intellectual property for the use of testing the environment for NonTuberculous Mycobacterium (NTM).
Cases detected by isolation of nontuberculous Mycobacterium spp.
Mycobacterium xenopi (M xenopi) is a slow-growing, nontuberculous mycobacterium (NTM), This organism is found in fresh water and has been isolated in water samples collected from water systems in homes and hospitals.
The article, which is authored by leading NonTuberculous Mycobacterium (NTM) research scientist, Dr.