Mycobacterium conspicuum

Mycobacterium conspicuum is 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.

Description[]

Gram-positive and nonmotile acid-fast coccobacilli. Does not form spores, capsules or aerial hyphae.

Colony characteristics

• Dysgonic and nonphotochromogenic, pale yellow colonies on Löwenstein-Jensen agar.

Physiology

• Slow growth on Löwenstein-Jensen medium at temperatures between 22 °C and 31 °C after 2–3 weeks.
• Susceptible to ethambutol, rifampin, streptomycin, resistant to pyrazinamide.
• Synthesis of α- and keto-mycolates and wax esters.
• no tolerance to 5% NaCl, positive for Tween 80 hydrolysis and for 10-day-arylsulfatase. Negative for production of nicotinic acid, acetamidase, benzamidase, urease, isonicotinamidase, nicotinamidase, pyrazinamidase, succinidamidase, nitrate reductase and tellurite reduction.

Pathogenesis[]

Opportunistic pathogen, disseminated mycobacteriosis, Biosafety level 2.

Type Strain[]

First isolated from two male HIV infected patients in Germany. Strain 3895/92 = ATCC 700090 = CIP 105165 = DSM 44136.

References[]

• Springer et al. 1996. Mycobacterium conspicuum sp. nov., a new species isolated from patients with disseminated infections. J. Clin. Microbiol., 33, 2805–2811. PMID 8576323

External links[]

• Type strain of Mycobacterium conspicuum at BacDive - the Bacterial Diversity Metadatabase

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