Description of Arthrobacter
Arthrobacter is a common genus of soil bacteria. All species in this genus are Gram-positive, obligate aerobes. Like many soil bacteria, this genus is metabolically versatile, producing many different enzymes allowing it to grow on a wide range of substrates. The cells can be quite tough and resist desiccation and starvation. Arthrobacter species have been isolated a few times from patients with immunodeficiencies but most strains do not appear to be pathogenic. A distinctive feature of this genus is that the shape of the cells changes during the growth cycle, typically forming rods during exponential growth and cocci in the stationary phase:
Type species: ¤ Arthrobacter globiformis (Conn 1928) Conn and Dimmick 1947. CONN HJ and DIMMICK I. 1947 Soil bacteria similar in morphology to Mycobacterium and Corynebacterium. Journal of Bacteriology, 54, 291-303.