Product: CNA Columbia Agar + 5% Def. Sheep Blood

For the isolation of more fastidious microorganisms to which the addition of special inhibitors (Colistin and Nalidixic Acid) make it highly selective for Gram positive-cocci, Staphylococci and Streptococci, particularly when Gram negative bacilli (e.g. Proteus) are present and tend to overgrow on conventional blood agar plates.