Mycobacterium malmoense

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

Mycobacterium malmoense
Scientific classification
Domain:
Bacteria
Phylum:
Class:
Order:
Family:
Genus:
Species:
M. malmoense
Binomial name
Mycobacterium malmoense
Schroder and Juhlin 1977, ATCC 29571

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

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
  • The first case of infectious endocarditis by M. malmoense was reported in 2020 in Cali, Colombia. The patient was a 61-year old woman with a history of biological mitral valve replacement due to rheumatic disease, dermatomyositis and rheumatoid arthritis in management with methotrexate, chloroquine, and prednisolone.[1]

Type strain

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

References

  1. Posso-Osorio, Iván; Las Salas, Alejandra De; Tobón, Gabriel J.; Sierra-Ruiz, Melibea; Cañas, Carlos A.; Bravo, Juan Carlos; Moncada, Pablo A. (2020). "Mycobacterium malmoense: an unusual pathogen causing endocarditis, a case report and literature review". IDCases. 22: e00999. doi:10.1016/j.idcr.2020.e00999. PMC 7642850. PMID 33194551.

Further reading

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