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The Runyon classification of nontuberculous mycobacteria based on the rate of growth, production of yellow pigment and whether this pigment was produced in the dark or only after exposure to light.[1]
It was introduced by Ernest Runyon in 1959.[2]
On these bases, the nontuberculous mycobacteria are divided into four groups:
The first three groups are classified as "Slowly growing Mycobacteria".
Runyon I organisms (photochromogens) are slow growing, and produce a yellow-orange pigment when exposed to light. The group includes Mycobacterium kansasii, Mycobacterium marinum, Mycobacterium asiaticum, and Mycobacterium simiae. Mycobacterium szulgai is a photochromogen when grown at 24 degrees, and a scotochromogen at 37 degrees. In contrast, Runyon classifications II through IV are considered nonphotochromogens, in that exposure to light does not make them produce pigment which they would not develop in dark growing conditions.[3]
Runyon II organisms (scotochromogens) are slow-growing and produce a yellow-orange pigment regardless of whether they are grown in the dark or the light. The group includes Mycobacterium gordonae and Mycobacterium scrofulaceum, among others. Mycobacterium szulgai is a scotochromogen when grown at 37 degrees, as mentioned above.
Runyon III organisms (nonchromogens) are slow-growing and never produce pigment, regardless of culture conditions. The group includes Mycobacterium avium and Mycobacterium intracellulare (together known as the MAI complex), Mycobacterium ulcerans and numerous other organisms.
Runyon IV organisms are rapid growing for mycobacteria (colonies in 5 days). They do not produce pigment. Mycobacterium fortuitum, Mycobacterium peregrinum, Mycobacterium abscessus, Mycobacterium chelonae, Mycobacterium thermoresistibile
Some rapidly growing mycobacteria are considered "late-pigmenting".[4]
Runyon has termed these organisms nonphotochromogenic, meaning that exposure to light does not make the[ir] pigment more intense.
Mycobacteria (including Nontuberculous)
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Slowly growing (R1P=photochromogenic; |
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Rapidly growing/ Runyon IV |
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Gram-positive bacterial infection: Actinobacteria (primarily A00–A79, 001–041, 080–109)
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Actinomycineae |
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Corynebacterineae |
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Bifidobacteriaceae |
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リンク元 | 「ラニヨン分類」 |
関連記事 | 「classification」 |
ラニアン分類 : 1 件 ラニャン分類 : nothing ラニヤン分類 : ラニョン分類 : ラニヨン分類 : 4 件 ラニアン分類 Runyon : nothing ラニャン分類 Runyon : nothing ラニヤン分類 Runyon : ラニョン分類 Runyon : ラニヨン分類 Runyon : 3 件
分類 | 菌種名 | |||
培養可能菌 | 遅発育菌 | 結核菌群 | Mycobacterium tuberculosis | |
Mycobacterium bovis | ||||
Mycobacterium microti | ||||
Mycobacterium africanum | ||||
非結核性抗酸菌群 | I群菌 光発色菌 |
Mycobacterium kansasii | ||
Mycobacterium marinum | ||||
Mycobacterium simiae | ||||
Mycobacterium asiaticum | ||||
II群菌 暗発色菌 |
Mycobacterium flavescens | |||
Mycobacterium gordonae | ||||
Mycobacterium scrofulaceum | ||||
Mycobacterium szulgai | ||||
III群菌 非光発色菌 |
Mycobacterium avium complex | |||
Mycobacterium celatum | ||||
Mycobacterium haemophilum | ||||
Mycobacterium gastri | ||||
Mycobacterium genavense | ||||
Mycobacterium malmoense | ||||
Mycobacterium nonchromogenicum | ||||
Mycobacterium shimoidei | ||||
Mycobacterium terrae | ||||
Mycobacterium trivale | ||||
Mycobacterium ulcerans | ||||
Mycobacterium xenopi | ||||
迅速発育菌 | IV群菌 | Mycobacterium abscessus | ||
Mycobacterium fortuitum group | ||||
Mycobacterium chelonae group | ||||
Mycobacterium phlei | ||||
Mycobacterium smegmatis | ||||
Mycobacterium vaccae | ||||
培養不能菌 | Mycobacterium leprae |
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