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Mycobacteria

Terms in this set (35)

Runyon classification categories
4 categories
Runyon 1-3 are slow growers
Runyon 4 are fast growers
What is Runyon 1?
Runyon I: Photochromogens
slow growing, and produce a yellow-orange pigment when exposed to light.
What organisms are classified as Runyon 1?
Mycobacterium kansasii
Mycobacterium marinum
Mycobacterium asiaticum
Mycobacterium simiae.
What is Runyon 2?
Runyon II: Scotochromogens
slow growing, and produce a yellow-orange pigment in light or in the dark
What organisms are classified as Runyon 2?
Mycobacterium scrofulaceum
Mycobacterium gordonae
Mycobacterium szulgai
Mycobacterium xenopi
Mycobacterium celatum
Mycobacterium flavescens
What is Runyon 3?
Runyon III: Nonchromogenic.
Runyon III organisms are slow growing, and do not produce pigment. Note that some may produce very pale yellow, buff, or tan pigment but do not intensify upon light exposure
What organisms are classified as Runyon 3?
Mycobacterium avium-intracellulare
Mycobacterium terrae
Mycobacterium paratuberculosis
Mycobacterium shimoidae
Mycobacterium genavense
What is Runyon 4?
Runyon IV: Rapid Growers
Runyon IV organisms are rapid growing for mycobacteria (colonies in 5 days).
They do not produce pigment.
Slow growers
non-chromogenic
Rough colonies
Mycobacterium africanum
Mycobacterium bovis
Mycobacterium caprae
Mycobacterium lacus
Mycobacterium lepraemurium
Mycobacterium microti
Mycobacterium pinnipedii
Mycobacterium shottsii
Mycobacterium tuberculosis
Slow growers
non-chromogenic
Smooth colonies
Mycobacterium branderi
Mycobacterium heidelbergense
Mycobacterium intracellulare
Mycobacterium malmoense
Slow growers
non-chromogenic
Smooth to rough colonies
Mycobacterium gastri
Mycobacterium haemophilum
Slow growers
Non-chromogenic
Small and transparent
Mycobacterium avium avium
Mycobacterium avium paratuberculosis
Mycobacterium avium silvaticum
Mycobacterium genavense
Mycobacterium montefiorense
Mycobacterium ulcerans
Slow growers
Chromogenic
Mycobacterium intermedium
Photochromogenic
Yellow and smooth
Mycobacterium asiaticum
Mycobacterium marinum
Photochromogenic
Yellow and rough
Mycobacterium kansasii
Mycolactone-producing mycobacteria
M. ulcerans, which causes the "Buruli", or "Bairnsdale, ulcer"
M. pseudoshottsii
M. shottsii
Scotochromogenic - yellow
Mycobacterium conspicuum
Mycobacterium botniense
Mycobacterium farcinogenes
Mycobacterium heckeshornense
Mycobacterium interjectum
Mycobacterium kubicae
Mycobacterium lentiflavum
Mycobacterium nebraskense
Mycobacterium nebraskense
Mycobacterium palustre
Mycobacterium tusciae
Scotochromogenic -
Yellow-Orange
Mycobacterium cookii
Mycobacterium flavescens
Mycobacterium gordonae
Mycobacterium tuberculosis complex
M. tuberculosis
M. bovis
M. bovis BCG
M. africanum
M. canetti
M. caprae
M. microti
M. pinnipedii
Mycobacterium avium complex
M. avium
M. avium paratuberculosis, which has been implicated in Crohn's disease in humans and Johne's disease in cattle and sheep
M. avium silvaticum
M. avium "hominissuis"
M. colombiense
M. indicus pranii
Mycobacterium gordonae clade
M. asiaticum
M. gordonae
Mycobacterium kansasii clade
M. gastri
M. kansasii
Mycobacterium nonchromogenicum
/terrae clade
...
Scotochromogenic -
Rose - Pink
Mycobacterium hiberniae
Scotochromogens (Group II)
Produce deep yellow to orange colonies when grown in the presence of either the light or the dark.
M. scrofulaceum
M. gordonae
M. xenopi
M. szulgai
Photochromogens (Group I)
Produce nonpigmented colonies when grown in the dark and pigmented colonies only after exposure to light and reincubation.
M. kansasii
M. marinum
M. simiae.
rapidly growing Mycobacteria
Mycobacterium fortuitum
Mycobacterium chelonei
Mycobacterium smegmatis
Mycobacterium abscessus
Mycobacterium mucogenicum
Mycobacterium peregrinum
XDR-TB
resistance to at least rifampin and isoniazid as well as to any member of the quinolone family and at least one of the following second-line anti-TB injectable drugs: kanamycin, capreomycin, or amikacin.
M. kansasii
Colonies grown in dark are nonpigmented, when grown in light or when young colonies are exposed briefly to light, colonies become brilliant yellow (photochromogenic).
If grown in a lighted incubator, most strains form dark red crystals of β-carotene on the surface and inside of colony.
Growth on Middlebrook 7H10 agar at 37°C within 7 days or more.
Resistant to pyrazinamide.
Susceptible to ethambutol.
M. marinum
...
M. scrofulaceum
...
M. gordonae
...
M. xenopi
...
M. szulgai
...
M. avium paratuberculosis
...
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