Selective broth medium used for cultivating streptococci in water, sewage and milk. Azide Dextrose Broth is recommended for the isolation of fecal streptococci. Sodium Azide is used to inhibit Gram negative microorganisms, by inhibiting cytochrome oxidase, while allowing the growth of Gram positive microorganisms, particularly Streptococcus sp.||Microbiological Analysis:|Enterococcus faecalis (ATCC 19433): Growth|Escherichia coli (ATCC 25922): Inhibited||Appearance: |Light beige, homogeneous and free flowing||Solubility: |Light to medium amber and clear.||pH: |7.2 ± 0.2 ||Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.