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Related to Mycobacterium tuberculosis: Mycobacterium leprae, Mycobacterium avium complex



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 ?
Mycobacterium tuberculosis complex genetic diversity: mining the fourth international spoligotyping database (SpolDB4) for classification, population genetics and epidemiology.
Characterization of human cellular immune responses to Mycobacterium tuberculosis proteins encoded by genes predicted in RD15 genomic region that is absent in Mycobacterium bovis BCG.
Vigilancia de la resistencia del Mycobacterium tuberculosis a los farmacos antituberculosos, Colombia 2004-2005.
In vitro activity of linezolid against Mycobacterium tuberculosis complex, including multidrug-resistant Mycobacterium bovis isolates.
RAPD discloses high molecular diversity of Mycobacterium tuberculosis from Michoacan, Mexico.
Use of the genotype MTBDR assay for rapid detection of rifampin and isoniazid resistance in Mycobacterium tuberculosis complex isolates.
Ip et al., "Whole-genome sequencing to delineate Mycobacterium tuberculosis outbreaks: a retrospective observational study," The Lancet Infectious Diseases, vol.
Primers for Norcadia asteroides ATCC 19247 and Mycobacterium tuberculosis H37RV were synthesized and purchased from inqaba biotec, South Africa.
Catalase-Peroxidase Gene (KatG) Deletion in Isoniazid Resistant Strains of Mycobacterium Tuberculosis., T Klin JMed Sci., 2004; 24: 243-246.
The Xpert MTB/RIF assay is a rapid PCR test for pulmonary Tuberculosis detection (sensitivity 89%, specificity 99%).4 Raj reported that this test should be amongst the major milestones for TB diagnosis and hence the management options.5 The Xpert MTB/RIF detects DNA sequences specific for mycobacterium tuberculosis and rifampicin resistance by polymerase chain reaction.4 It is based on the Cepheid GeneXpert system, a platform for rapid and simple-to-use nucleic acid amplification tests (NAAT).
De Haas et al., "Predominance of a single genotype of Mycobacterium tuberculosis in countries of East Asia," Journal of Clinical Microbiology, vol.

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