Mycobacterium gordonae

Mycobacterium gordonae is a species of Mycobacterium named for Ruth E. Gordon. It is a species of the phylum Actinomycetota (Gram-positive bacteria with high guanine and cytosine content, one of the dominant phyla of all bacteria), belonging to the genus Mycobacterium.

Description

Gram-positive, nonmotile and moderate to long acid-fast rods.

• Commonly found in tap water and soil. Casual resident in human sputum and gastric lavage specimens.

Colony characteristics

• Smooth, with yellow or orange scotochromogenic colonies. Even though they are scotochromogenic pigment is intensified by growing in continuous light.

Physiology

• Growth on Löwenstein-Jensen medium and Middlebrook 7H10 agar within 7 or more days at 37 Ã‚°C (optimal 25 Ã‚°C).
• Does not grow in the presence of ethambutol (1 mg/L), isoniazid (10 mg/L) and sodium chloride (5%).
• Some strains can grow using carbon monoxide as a carbon and energy source.

Differential characteristics

• A commercial hybridisation assay (AccuProbe) to identify M. gordonae exists.
• Intraspecies variability in 16S rDNA sequences

Pathogenesis

• Rarely if ever implicated in disease processes even if patients are immunocompromised. Widely distributed in environment and usually a contaminant in laboratory specimens.
• Biosafety level 2

Type strain

Strain ATCC 14470 = CCUG 21801 = CCUG 21811 = CIP 104529 = DSM 44160 = JCM 6382 = NCTC 10267.

References

Further reading

External links

• Type strain of Mycobacterium gordonae at BacDive - the Bacterial Diversity Metadatabase