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Mycobacterium gastri : ウィキペディア英語版 | Mycobacterium gastri
''Mycobacterium gastri'' 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== Moderately long to long, Gram-positive, nonmotile and acid-fast rods. Colony characteristics *Nonchromogenic, smooth to rough, white colonies on Löwenstein-Jensen medium and smooth or somewhat granular on Middlebrook 7H10 agar. Physiology *Growth on Löwenstein-Jensen medium or on Middlebrook 7H10 agar at 37°C, (temperature range 25°C-40°C), within 7 or more days. *Does not grow in the presence of ethambutol or isoniazid. Differential characteristics *Closely related to M. kansasii * M. gastri and M. kansasii share an identical 16S rDNA sequence. Species differentiation is possible by differences in the ITS and hsp65 sequences. *M. kansasii produces a photochromogenic yellow pigment. *AccuProbes for M. kansasii are negative.
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