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Mycobacterium cookii : ウィキペディア英語版 | Mycobacterium cookii
''Mycobacterium cookii'' is a species of the phylum actinobacteria (Gram-positive bacteria with high guanine and cytosine content, one of the dominant phyla of all bacteria), belonging to the genus mycobacterium. ==Description== Gram-positive, nonmotile and polymorphic acid-fast rods (0.8 µm x 1.4–1.9 µm). Forms clumps, but not cords or cross bands. Does not form spores, capsules and aerial hyphae. Colony characteristics *Colonies are smooth and glistening with yellow-orange pigmentation (0.5–1.0 mm diameter, scotochromogenic). Physiology *Slow growth on Löwenstein-Jensen medium or Middlebrook 7H10 agar at 31°C (optimal temperature). No growth at 37°C, 42°C or 45°C. *Most of the strains are susceptible to ethambutol, isoniazid, streptomycin, and rifampin. Differential characteristics *Phylogenetic position between the slowly growing pathogenic species and the saprotrophic rapidly growing species by partial 16S rDNA sequencing.
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