photochromogen

photochromogen: pho·to·chro·mo·gen .fōt-ō-'krō-mə-jən n a microorganism esp. of the genus Mycobacterium (as M. kansasii) that has little or no pigment when grown in the dark but becomes highly pigmented when grown in light

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pho·to·chro·mo·gen (fo″to-kroґmə-jən) [photo- + chromo- + -gen] a microorganism whose pigmentation develops as a result of exposure to light, e.g., Mycobacterium kansasii (pathogenic for humans), which is yellow-orange if grown in the light, and almost colorless if grown in the dark. See also nontuberculous mycobacteria, under mycobacterium.

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Mycobacterium avium — Systematik Abteilung: Actinobacteria Klasse: Actinobacteria Ordnung: Actinomycetales Familie … Deutsch Wikipedia
Mycobacterium paratuberculosis — Mycobacterium avium Systematik Abteilung: Actinobacteria Klasse: Actinobacteria Ordnung: Actinomycetales … Deutsch Wikipedia
Mycobacterium kansasii — a slow growing, photochromogenic species that is the etiologic agent of a tuberculosis like disease and is often isolated from lung secretions or tubercles; the incidence of infection is sharply increased among immunocompromised persons. See also … Medical dictionary
Mycobacterium szulgai — a slow growing, pathogenic species that behaves as a scotochromogen at 37°C and as a photochromogen at 25°C. It is associated with pulmonary infections but may be found in nonpulmonary sites … Medical dictionary

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