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Mycobacterium malmoense

Species of bacterium

Species of bacterium

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
  • 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.

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

References

  1. (2020). "Mycobacterium malmoense: an unusual pathogen causing endocarditis, a case report and literature review". IDCases.
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

acid-fast-bacilli nontuberculous-mycobacteria bacteria-described-in-1977
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