Quick Review Cards for Medical Laboratory Science

(avery) #1

Classification of Nontuberculous


Mycobacteria Based on Physiology


Clinical Microbiology Review 211

RUNYOUN GROUP CHARACTERISTICS EXAMPLES

Photochromogens


Scotochromogens


Nonphotochromogens


Rapid growers


M. marinum, M. kansasii

M. gordonae

M. avium complex, M. ulcerans

M. smegmatis

Yellow pigment when exposed to light after being grown in dark.
>7 days to appear on solid media.

Yellow pigment when grown in light or dark.
>7 days to appear on solid media.

No pigment produced in light or dark.
>7 days to appear on solid media.

<7 days to appear on solid media.
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