|
''Mycobacterium boenickei'' 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: boenickei, of Bönicke, in honour of the contribution of Rudolf Bönicke, a German mycobacteriologist, who first recognized the heterogeneity within the Mycobacterium fortuitum complex. ==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 matt, domed, scalloped-edged and do not demonstrate aerial hyphae. *On heart infusion agar with 5% (v/v) rabbit blood for 2 days at 35 °C. shows white to slightly beige, small-diameter (approx. 1 mm) colonies. 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 *None of the isolates grow in lysozyme or utilize citrate, and five of six (83%) isolates produce arylsulfatase in 3 days. *The semi-quantitative catalase activity of all isolates is reactive (>45 mm). Differential characteristics *The nearest phylogenetic neighbours, according to 16S rRNA gene sequence similarity, are M. neworleansense and all M. porcinum isolates studied (all 99·9%). 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 boenickei」の詳細全文を読む スポンサード リンク
|