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R E G N U M PROKARYOTAE |
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Genus Mycobacterium |
Family Mycobacteriaceae |
Aerobic to microaerophilic, slightly curved or straight rods 0.2-0.6 × 1.0-10 μm, which are acid-alcohol-fast at some stage of growth. Most are difficult to stain by Gram’s method (considered Gram-stain-positive). Branching or a filamentous or mycelium-like growth may appear. Nonmotile and asporogenous. Colonies may be white- to cream-coloured; some strains produce yellow- or orange-pigmented colonies with or without light stimulation. |
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