Mycobacterium lacus

Description

• 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.

  Physiology

• 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.

  Pathogenesis

• The causative agent of bursitis in an immunocompetent individual.

  Type strain

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