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''Mycobacterium brisbanense'' is a member of the Mycobacterium fortuitum third biovariant complex. They are rapidly growing ubiquitous environmental organisms that normally inhabit soil, dust and water. These organisms frequently are human pathogens that cause a wide spectrum of clinically significant disease. It is important for practitioners to be aware of these organisms as possible etiological agents, as they are resistant to most first-line anti-tuberculous agents. *Etymology: brisbanense, pertaining to Brisbane, Queensland, Australia, the source of the type strain. ==Description== Microscopy *The organisms are acid-fast, Gram-positive, pleomorphic bacilli. Long filamentous forms are often observed, but spores and capsules are absent. Colony characteristics *Colonies are mucoid, convex, round, entire-edged and do not demonstrate aerial hyphae. *Colonies are white to slightly beige and small in diameter (approx. 1 mm) after incubation on heart infusion agar with 5% (v/v) rabbit blood for 2 days at 35 °C. Physiology *Growth occurs on Löwenstein–Jensen medium at 35 °C in less than 7 days, but no growth occurs at 42 °C. *Growth occurs on 5% NaCl and on MacConkey's agar without crystal violet at 28 °C. *Arylsulfatase activity by 3 days, utilizes acetamide, reduces nitrate, produces urease and exhibits iron uptake. *It does not utilize citrate or grow in lysozyme. Semi-quantitative catalase activity is weakly positive (<45 mm). *It does not utilize citrate, grow in lysozyme or produce thermostable catalase. Differential characteristics *The nearest phylogenetic neighbour, according to 16S rRNA gene sequence similarity, is Mycobacterium diernhoferi ATCC 19340T. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mycobacterium brisbanense」の詳細全文を読む スポンサード リンク
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