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Related to Mycobacterium bovis: Mycobacterium tuberculosis, Mycobacterium avium



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 ?
Human Mycobacterium bovis infection in ten Latin American countries.
Rasolofo-Razanamparany V, Menard D, Rasolonavalona T, Ramarokoto H, Racotomanana F, Auregan G, Vincent V and S Chanteau Prevalence of Mycobacterium bovis in human pulmonary and extra-pulmonary tuberculosis in Madagascar.
Brown DH, Lafuse W, Zwilling BS (1995) Cytokine-mediated activation of macrophages from Mycobacterium bovis BCG-resistant and susceptible mice: differential effects of corticosterone on antimycobacterial activity and expression of the Bcg gene (candidate Nramp).
Humoral immunosuppressant activity of aflatoxin ingestion in rabbits measured by response to Mycobacterium bovis antigens using enzyme-linked immunosorbent assay and serum protein electrophoresis.
Mycobacterium bovis, part of the Mycobacterium tuberculosis complex, is a zoonotic pathogen that can cause tuberculosis (TB) disease in a broad range of mammalian hosts (1).
Bacilli Calmette-Guerin (BCG) is a type of Mycobacterium bovis species bearing all the structural features of M.
BCG derives from the Mycobacterium bovis bacterium, which infects cattle and is closely related to MTB.
1) As a positive control, Mycobacterium bovis (B/29292) DNA was included.
The issue focuses on two key areas: the newly designated genus Cronobacter, an organism that has come to prominence due to its association with severe neonatal infections, necrotizing enterocolitis, septicaemia and potentially fatal meningitis, and Mycobacterium bovis, the causative bacterium of bovine tuberculosis.
Failure of the Mycobacterium bovis BCG vaccine: some species of environmental mycobacteria block multiplication of BCG and induction of protective immunity to tuberculosis.
In South Africa newborns are routinely vaccinated with BCG, but many of these infants are born with HIV and their weakened immune system makes them vulnerable to the live Mycobacterium bovis that is used in the BCG--which can itself cause a TB-like illness.

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