Mycobacterium conceptionense

Mycobacterium conceptionense is a non pigmented rapidly growing mycobacterium was first isolated from wound liquid outflow, bone tissue biopsy, and excised skin tissue from a 31-year-old woman who suffered an accidental open right tibia fracture and prolonged stay in a river. Etymology: conceptionense, pertaining to Hôpital de la Conception, the hospital where the first strain was isolated.

Mycobacterium conceptionense
Scientific classification
Kingdom:
Bacteria
Phylum:
Actinobacteria
Order:
Actinomycetales
Suborder:
Corynebacterineae
Family:
Mycobacteriaceae
Genus:
Mycobacterium
Species:
M. conceptionense
Binomial name
Mycobacterium conceptionense
Adékambi et al. 2006, CCUG 50187

Description

Microscopy

Colony characteristics

  • Colonies are non pigmented.

Physiology

  • Colonies appear on 5% sheep blood agar, Middlebrook 7H10 agar, and egg-based Lowenstein-Jensen slants in 2 to 5

days at temperatures between 25 and 37 °C, optimally at 30 °C. No growth occurs at 42 °C.

  • The type strain is susceptible in vitro to imipenem, minocycline, doxycycline, clarithromycin, erythromycin, azithromycin, amikacin, ciprofloxacin, ofloxacin, sparfloxacin, and amoxicillinclavulanate and resistant to penicillin, amoxicillin, and vancomycin.

Differential characteristics

  • M. conceptionense shares 99.7% 16S rRNA (4-bp difference) and 97.0% rpoB gene sequence similarity with Mycobacterium porcinum, the nearest species.

Pathogenesis
  • This species is associated with post traumatic osteitis.

Type strain
  • Strain D16 = CCUG 50187 = CIP 108544

References
    • Adékambi,T., et al. 2006. Description of Mycobacterium conceptionense sp. nov., a Mycobacterium fortuitum group organism isolated from a posttraumatic osteitis inflammation. J. Clin. Microbiol., 44, 1268-1273. PMID 16597850


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