Trisha Shetty (Editor)

Mycobacterium gastri

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Kingdom
  
Bacteria

Order
  
Actinomycetales

Family
  
Mycobacteriaceae

Scientific name
  
Mycobacterium gastri

Phylum
  
Actinobacteria

Suborder
  
Corynebacterineae

Genus
  
Mycobacterium

Rank
  
Species

Similar
  
Mycobacterium flavescens, Mycobacterium gordonae, Mycobacterium malmoense, Mycobacterium scrofulaceum, Mycobacterium celatum

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.

Contents

Description

Moderately long to long, Gram-positive, aerobic, 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

    Mycobacterium gastri Wikipedia
    (Text) CC BY-SA