Mycobacterium


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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 ?
Draft genome sequence of Mycobacterium obuense strain UC1, isolated from patient sputum.
Transmission of Mycobacterium chimaera from heater-cooler units during cardiac surgery despite an ultraclean air ventilation system.
A case of skin and soft tissue infection caused by Mycobacterium abscessus.
Mycobacterium avium subspecies paratuberculosis cultured from locally and commercially pasteurized cow's milk in the Czech Republic.
The generated restriction patterns of the isolates were verified against those present in PRA online database (http://app.chuv.ch/prasite/index.html) and identification of Mycobacterium species was performed.
Witzig, "Mycobacterium kansasii in HIV patients: clarithromycin and antiretroviral effects," International Journal of Tuberculosis and Lung Disease, vol.
Toward eradication: The effect of Mycobacterium bovis infection in wildlife on the evolution and future direction of bovine tuberculosis management in New Zealand.
TBc identification device is based on the detection of a protein (MPT64) secreted by Mycobacterium tuberculosis complex (MTC), can detect Mycobacterium tuberculosis in 15 min from acid-fast bacillus (AFB)-positive MGIT cultures.11 MPT 64 is the protein produced only by Mycobacterium tuberculosis, not by Non-tuberculosis Mycobacteria.
Molecular basis of intrinsic macrolide resistance in clinical isolates of Mycobacterium fortuitum.
Two markers, IS901-IS902 and p40, identified by PCR and by using monoclonal antibodies in Mycobacterium avium strains.
According to the sequence comparison, four NTM species of the genus Mycobacterium were identified; 64% (6/13) of the strains had 98% and 99% of similarities with M.

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