Gram-positive, nonmotile, acid-fast and coccoid to short rods. *Environmental reservoir: soil and water. Colony characteristics *Smooth and nonpigmented colonies, growth below the surface of semisolid agar medium after deep inoculation (as seen with M. bovis), 0.9 - 1.7mm in diameter. Physiology *Growth on inspissated egg medium and oleic acid-albumin agar at a temperature range of 22 °C-37 °C requires over 1 week. *Susceptible to ethambutol, ethionamide, kanamycin and cycloserine. Differential characteristics *Antigenic structure: seroagglutination demonstrates a single serovar distinct from that of other species.
Mycobacterium malmoense
Mycobacterium orygis
Mycobacterium africanum
Mycobacterium canetti
Mycobacterium kansasii
Mycoplasma incognitus
Mycoplasma orale
Mycobacterium haemophilum