Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Mycobacterium gastri
Introduction
Mycobacterium gastri
Description
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
Pathogenesis
- Casual resident of human stomachs, but not considered an etiologic agent of disease.
- Biosafety level 1
Type Strain
Type Strain
- First isolated from human gastric specimen. Also found in soil.
Strain ATCC 15754 = CCUG 20995 = CIP 104530 = DSM 43505 = JCM 12407.
References
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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