mycobacteria

Organisms belonging to the genus Mycobacterium.
- atypical m. species of m. other than M. tuberculosis or M. bovis that can cause disease in immunocompromised humans; being replaced by the designation of MOTT (M. Other Than Tuberculosis).
- Runyon group I m. m. that produce a bright yellow color when grown in the presence of light. Organisms placed in this group include Mycobacterium kansasii. SYN: photochromogens.
- Runyon group II m. m. that produce a yellow pigment even when grown in the dark; when grown in the light, the pigment is orange. These organisms behave as saprophytes do in humans and are usually nonpathogenic to laboratory animals. SYN: scotochromogens.
- Runyon group III m. m. that are either colorless or that slowly produce a light yellow pigment when grown in the presence of light. Organisms placed in this group include Mycobacterium avium and M. intracellulare. SYN: nonchromogens.
- Runyon group IV m. m. that grow rapidly and that do not produce pigment. Organisms placed in this group belong to such species as Mycobacterium ulcerans and M. marinum.

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my·co·bac·te·ria (mi″ko-bak-tēr-eə) plural of mycobacterium.

Medical dictionary. 2011.

Look at other dictionaries:

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  • mycobacteria — my·co·bac·te·ria …   English syllables

  • mycobacteria — noun rod shaped bacteria some saprophytic or causing diseases • Syn: ↑mycobacterium • Hypernyms: ↑eubacteria, ↑eubacterium, ↑true bacteria • Hyponyms: ↑tubercle bacillus, ↑ …   Useful english dictionary

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  • Mycobacteria other than tuberculosis — MOTT (engl. mycobacteria other than tuberculosis) ist eine klinisch übliche Abkürzung für sogenannte atypische Mykobakterien, das heißt alle für den Menschen potenziell (fakultativ) krankheitserregenden Mykobakterien außer den Erregern der… …   Deutsch Wikipedia

  • nontuberculous mycobacteria — mycobacteria other than M. tuberculosis or M. bovis. They are divided into four groups (Runyon groups) based on pigmentation and rate of growth, each containing several species. Group I includes slow growing photochromogens; group II slow growing …   Medical dictionary

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