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 ?
A simple, rapid, and effective method for the extraction of Mycobacterium paratuberculosis DNA from fecal samples for polymerase chain reaction.
Heat inactivation of Mycobacterium paratuberculosis in raw milk: Are current pasteurization conditions effective?
Polymerase chain reaction detection of Mycobacterium paratuberculosis and Mycobacterium avium subsp.
(13.) Grant IR (1998) Does Mycobacterium paratuberculosis survive current pasteurization conditions?
Collins, "Thermal tolerance of Mycobacterium paratuberculosis," Applied and Environmental Microbiology, vol.
Elk infected with Mycobacterium paratuberculosis may show non-specific clinical signs including poor weight gain and poor shedding of hair coat and just prior to death rapid weight loss and diarrhea may occur (Smits, 1991).
Previously, researchers had linked Crohn's disease to an organism called Mycobacterium paratuberculosis. This microbe (not to be confused with M.
Analysis by ELISA and Western Blotting of antibody reactivities in cattle infected with Mycobacterium paratuberculosis after absorption of serum withM.
Therefore, appropriate hygienic measures are critical to safeguard human population against meat- borne Mycobacterium paratuberculosis infection.
Investigation of Mycobacterium paratuberculosis in sheep by faecal culture, DNA characterisation and the polymerase chain reaction.
Effect of Mycobacterium paratuberculosis infection on production, reproduction, and health traits in US Holsteins.
El agente etiologico es Mycobacterium avium subespecie paratuberculosis (anteriormente Mycobacterium paratuberculosis), clasificado dentro de la familia produce infeccion comunmente en pacientes inmunosuprimidos, principalmente aquellos con VIH/SIDA (10).

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