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.