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CDC Anaerobic Blood Agar (CDC) is an enriched and differential media used for the growth and partial identification of obligate anaerobes. It supports good growth of aerobic, facultative anaerobic, and microaerophilic organisms found in clinical materials if incubated under the appropriate conditions. This media is prepared, dispensed, and packaged under oxygen-free conditions to prevent the formation of oxidized products prior to use.CDC is a tryptic soy agar base supplemented with vitamin K1 and hemin to facilitate the recovery of more fastidious organisms, such as Prevotella, Porphyromonas, and the Bacteroides fragilis group, and should facilitate the pigment production of Prevotella melaninogenica. Sheep blood is added for the observation of hemolytic reactions as seen by the double zone of -hemolysis of Clostridium perfringens, and various growth factors.