Mycobacterium lacus

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Mycobacterium lacus
Scientific classification
Kingdom: Bacteria
Phylum: Actinobacteria
Order: Actinomycetales
Suborder: Corynebacterineae
Family: Mycobacteriaceae
Genus: Mycobacterium
Species: M. lacus
Binomial name
Mycobacterium lacus
Turenne et al. 2002, ATCC BAA-323

Mycobacterium lacus is a species of bacteria in the Mycobacterium family known to be a causative agent in immunocompetent individuals.


Large, dispersed acid-fast bacilli with prominent beading

Colony characteristics

  • Colonies on Löwenstein-Jensen medium were nonchromogenic, small, with a dry appearance.
  • On Middlebrook 7H10 agar, colonies are small, non-pigmented and smooth to rough, with a slightly irregular edge. Younger colonies appeared slightly transparent.


  • Growth was observed on Löwenstein-Jensen medium at two weeks at both 37 and 42 °C and at 3 weeks at 30 °C. At four weeks, very little growth was observed at 25 °C, and no growth was observed at 52 °C.


Type strain[edit]

  • Isolated from synovial tissue from a 68-year-old female with bursitis of her right elbow. The likely exposure was in a lake.

Strain NRCM 00-255 = ATCC BAA-323 = DSM 44577


  • Turenne et al. 2002. Mycobacterium lacus sp. nov., a novel slowly growing, non-chromogenic clinical isolate. Int. J. Syst. Evol. Microbiol., 52, 2135-2140. PMID 12508880

External links[edit]