Mycobacterium confluentis

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Mycobacterium confluentis
Scientific classification
Kingdom: Bacteria
Phylum: Actinobacteria
Order: Actinomycetales
Suborder: Corynebacterineae
Family: Mycobacteriaceae
Genus: Mycobacterium
Species: M. confluentis
Binomial name
Mycobacterium confluentis
Kirschner et al. 1992, ATCC 49920

Mycobacterium confluentis is a non-pathogenic bacterium of the oral cavity.


Gram-positive, nonmotile, acid-fast coccobacillus (0.5-0.8 µm x 0.7-1.7 µm), does not form spores, capsules or aerial hyphae.


Differential characteristics[edit]

  • Differentiation from other thermotolerant mycobacteria by its inability to grow at temperatures of more than 41°C.
  • Separation from other rapidly growing mycobacteria by its susceptibility to antituberculotic drugs.
  • Differentiated from the phenotypic closely related M. thermoresistibile by its inability to grow at 52°C.


Not associated with disease. Biosafety level 1.

Type strain[edit]

First isolated from sputum, Koblenz, Germany. strain 1389/90 = ATCC 49920 = CIP 105510 = DSM 44017 = JCM 13671.


  • Kirschner et al. 1992. Mycobacterium confluentis sp. nov. Int. J. Syst. Bacteriol., 42, 257-262. PMID 1374623

External links[edit]