title: Mycobacterium conspicuum
text: # Mycobacterium conspicuum
  
  Mycobacterium conspicuum 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.
  
  ## 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.
  
  