Mycobacterium madagascariense Etymology: madagascariense, relating to Madagascar where it was first isolated. Description Polymorphic, gram-positive, nonmotile and acid-fast rods. Colony characteristics Smooth and glistening colonies with yellow or orange pigmentation (1-2mm in diameter). Physiology Rapid growth on Löwenstein-Jensen medium and Middlebrook 7H10 agar at 31 °C. No growth at 37 °C or above. Differential characteristics Differentiated from Mycobacterium aurum and Mycobacterium obuense by its failure to grow at 37 °C Pathogenesis Not known to be pathogenic. Biosafety level 1 Type strain First isolated from three different sphagnum biotopes in Madagascar. Strain P2 = ATCC 49865 = CIP 104538 = JCM 13574. References Kazda et al. 1992. Mycobacterium madagascariense sp. nov. Int. J. Syst. Bacteriol., 42, 524–528. External links Type strain of Mycobacterium madagascariense at BacDive - the Bacterial Diversity Metadatabase Acid-fast bacilli madagascariense Bacteria described in 1992