Mycobacterium gastri
From Infogalactic: the planetary knowledge core
| Mycobacterium gastri | |
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M. gastri
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| Mycobacterium gastri Wayne 1966, ATCC 15754
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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.
Pathogenesis
- Casual resident of human stomachs, but not considered an etiologic agent of disease.
- Biosafety level 1
Type strain
- First isolated from human gastric specimen. Also found in soil.
Strain ATCC 15754 = CCUG 20995 = CIP 104530 = DSM 43505 = JCM 12407.
References
- Wayne,L. 1966. Classification and identification of mycobacteria. III. Species within Group III. American Review of Respiratory Diseases, 93, 919-928.]
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