Mycobacterium haemophilum

Mycobacterium haemophilum is a species of the phylum Actinomycetota (Gram-positive bacteria with high guanine and cytosine content, one of the dominant phyla of all bacteria), belonging to the genus Mycobacterium.

Mycobacterium haemophilum
Scientific classification
Domain:
Bacteria
Phylum:
Class:
Order:
Family:
Genus:
Species:
M. haemophilum
Binomial name
Mycobacterium haemophilum
Sompolinsky et al. 1978, ATCC 29548

Description

Short, occasionally curved, gram-positive, nonmotile and strongly acid-fast rods.

Colony characteristics

  • Nonpigmented and rough to smooth colonies.

Physiology

  • Media have to be supplemented with 0.4% haemoglobin or 60 μM hemin (factor X) or 15 mg/ml ferric ammonium citrate respectively, but not with FeCl3 or catalase.
  • Slow growth on Löwenstein–Jensen medium or Middlebrook 7H10 agar at 32 °C within 2 to 4 weeks.
  • Growth slower at 25 °C and 35 °C and absent at 37 °C.
  • Strictly intracellular growth in tissue cultures of fibroblasts.

Differential characteristics

  • Unique among mycobacteria in its requirement for hemin or ferric ammonium citrate for growth.

Distribution.

Pathogenesis

Type strain

First isolated in Israel from a subcutaneous granuloma from a patient with Hodgkin's disease. An environmental reservoir is presumed. Strain ATCC 29548 = CCUG 47452 = CIP 105049 = DSM 44634 = NCTC 11185.

Notes

References

  • Sompolinsky, D.; Lagziel, A.; Naveh, D.; Yankilevitz, T. (1978). "Mycobacterium haemophilum sp. nov., a New Pathogen of Humans". International Journal of Systematic Bacteriology. 28 (1): 67–75. doi:10.1099/00207713-28-1-67.


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