Mycobacterium heidelbergense

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Mycobacterium heidelbergense
Scientific classification
Kingdom: Bacteria
Phylum: Actinobacteria
Order: Actinomycetales
Suborder: Corynebacterineae
Family: Mycobacteriaceae
Genus: Mycobacterium
Species: M. heidelbergense
Binomial name
Mycobacterium heidelbergense
Haas et al. 1998, ATCC 51253

Mycobacterium heidelbergense is a Gram-positive, nonmotile, acid-fast, coccobacilli. It's a species of the phylum actinobacteria (Gram-positive bacteria with high guanine and cytosine content, one of the dominant phyla of all bacteria), belonging to the genus mycobacterium.


Dimensions : 0.5-0.8 µm x 2.0-3.0 µm

Colony characteristics


Differential characteristics

  • Differentiation from M. malmoense, (bearing a strong phenotypic resemblance to M. heidelbergense), by its wider range of susceptibility to antituberculous drugs, (including isoniazid), and by its inability to grow on Löwenstein-Jensen medium at 25°C.
  • Differentiation of M. triplex from M. heidelbergense by its positive nitrate reduction test and by its characteristic HPLC profile (triple-mycolate pattern).


Type strain[edit]

Strain 2554/91 = ATCC 51253 = CIP 105424 = DSM 44471.


  • Haas et al. 1997. A new agent of mycobacterial lymphadenitis in children: Mycobacterium heidelbergense sp. nov. J. Clin. Microbiol. 35, 3203-3209.