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''Mycobacterium botniense'' is a slowly growing Mycobacterium, which produces a yellow pigment. It was first isolated from a stream of water. ''M. botniense'' is most closely related to Mycobacterium xenopi. Etymology: botniense; of Botnia, referring to the Latin name of the province of Finland from which the isolation was made. ==Description== Microscopy *Gram-positive, nonmotile and acid-fast rods. Colony characteristics *Colonies on Löwenstein-Jensen media and on Middlebrook 7H11 agar are small, dysgonic and scotochromogenic, and produce yellow pigment. Physiology *Visible growth from diluted inocula requires 5 to 8 weeks. Growth occurs at 37 to 50 °C. *The type strain is positive for 10-d arylsulfatase and pyrazinamidase. *Negative for 3-d arylsulfatase, urease, nitrate reductase, semi-quantitative catalase, heat-stable catalase, acid phosphatase, b-galactosidase and 5% NaCl tolerance. *Tween 80 is not hydrolysed in 10 d. Differential characteristics *A phylogenetic tree based on the evaluation of 16S rDNA sequences places ''M. botniense'' among the slow-growing mycobacteria, closest to ''M. xenopi''. 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 botniense」の詳細全文を読む スポンサード リンク
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