Anaerobic Basal Agar is used for the growth of anaerobic microorganisms, particularly Bacteroides species and other fastidious anaerobes. Anaerobic basal agar can be made selective for gram-negative anaerobes by the addition of Non- spore Anaerobic Supplement (FD001) and G.N. Spore Anaerobic Supplement (FD002). Hemin and Vitamin K in the medium serves as essential growth factors for Bacteroides species. Sodium succinate helps to improve the growth of Bacteroides species. Arginine and L-cysteine helps to revive and enhance the growth of certain anaerobes.Dithiothreitol serves as reducing agent.