Tetrathionate Brilliant Green? Broth Base（TTB）（Granular）

Testing principle:Peptone and beef extract powder provide carbon sources， nitrogen sources， and vitamins to meet the nutritional requirements for bacterial growth；Sodium Chloride maintains osmotic equilibrium; Calcium Carbonate neutralizes acids produced by bacteria and absorbs toxic metabolic products；Sodium Thiosulfate and Sodium Tetrathionate (formed in situ by the addition of Iodine and Potassium Iodide to the medium) act in combination to inhibit intestinal commensal bacteria， while bacteria possessing sodium tetrathionate reductase can proliferate on this medium. Bile Salts and Brilliant Green inhibit coliform bacteria and other Gram-positive bacteria.