Tryptic Soy Agar contains digests of soybean meal and casein, making it suitable for the growth of a wide variety of fastidious and nonfastidious microorganisms.(2-6, 8) The combination of soy and casein peptones supply organic nitrogen in the form of amino acids and polypeptides, making the medium highly nutritious. Sodium chloride is added to maintain the osmotic equilibrium. Products containing additional salt (Cat. nos. Q90, Q91, and Q92) are recommended for use in determining the halotolerance levels of microorganisms. Agar is the solidifying agent
