Scotochromogenic
Scotochromogenic bacteria develop pigment in the dark or in the light. Runyon Group II nontuberculous mycobacteria are examples but the term could apply to many other organisms.
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| Slowly growing
(R1P=photochromogenic;
R2S=scotochromogenic;
R3N=nonchromogenic) | Long helix 18
(TKHGC) | M. tuberculosis group | |
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| K/H groups | M. kansasii group | |
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| M. haemophilum group | |
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| M. conspicuum group | |
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| Long helix 18
(other) | M. xenopi group | |
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| M. celatum group | |
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| M. hiberniae group | |
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| Short helix 18 | |
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| Ungrouped | |
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| Rapidly growing/
Runyon IV | M. neoaurum group | |
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| F/T groups | M. fortuitum group | |
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| M. vaccae group | |
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| M. smegmatis group | |
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| M. chelonae group | |
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| M. elephantis group | |
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