M. luteus is a Gram-positive, spherical bacterium, found in soil, dust, water and air, and as part of the normal flora of mammalian skin. It also colonizes the human mouth, mucous membranes, oropharynx and upper respiratory tract. M. luteus can grow well in environments with little water or high salt concentrations. They grow optimally at 37°C.
Item sold as a 10mL broth.