Mycobacterium gastri

Mycobacterium gastri
Mycobacterium gastri
Scientific classification
Kingdom: Bacteria
Phylum: Actinobacteria
Order: Actinomycetales
Suborder: Corynebacterineae
Family: Mycobacteriaceae
Genus: Mycobacterium
Species: M. gastri
Binomial name
Mycobacterium gastri
Wayne 1966, ATCC 15754

Mycobacterium gastri

Contents

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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