Mycobacterium malmoense

Mycobacterium malmoense
Scientific classification
Kingdom:	Bacteria
Phylum:	Actinobacteria
Order:	Actinomycetales
Suborder:	Corynebacterineae
Family:	Mycobacteriaceae
Genus:	Mycobacterium
Species:	M. malmoense
Binomial name
Mycobacterium malmoense Schroder and Juhlin 1977, ATCC 29571

Mycobacterium malmoense is a Gram-positive bacterium from the genus Mycobacterium.

Etymology

From the city of Malmö, Sweden where the strain used for the description was isolated from patients.

Description

Gram-positive, nonmotile, acid-fast and coccoid to short rods.

• Environmental reservoir: soil and water.

Colony characteristics

• Smooth and nonpigmented colonies, growth below the surface of semisolid agar medium after deep inoculation (as seen with M. bovis), 0.9 - 1.7mm in diameter.

Physiology

• Growth on inspissated egg medium and oleic acid-albumin agar at a temperature range of 22°C-37°C requires over 1 week.
• Susceptible to ethambutol, ethionamide, kanamycin and cycloserine.

Differential characteristics

• Antigenic structure: seroagglutination demonstrates a single serovar distinct from that of other species.

Pathogenesis

• Usually infects young children with cervical lymphadenitis or adults with chronic pulmonary disease, (mostly with previously documented pneumoconiosis).
• Rarely causes extrapulmonary diseases and disseminated infections
• Biosafety level 2

Type strain

• First isolated from sputum and biopsy specimens with pulmonary disease in Malmö, Sweden.

Strain ATCC 29571 = CCUG 37761 = CIP 105775 = DSM 44163 = JCM 13391 = NCTC 11298.

References

• Schroder,K., I. Juhlin 1977. Mycobacterium malmoense sp. nov. International Journal of Systematic Bacteriology, 1977, 27, 241-246.]