產品名稱：TRYPTONE SOYA AGAR胰蛋白胨大豆瓊脂
產品貨號：OXOID CM0131B
產品規格：500G
Description
A general purpose agar medium, containing two peptones, which will support the growth of a wide variety of organisms. It is suitable for the cultivation both of aerobes and anaerobes, the latter being grown either in deep cultures or by incubation under anaerobic conditions. The medium may also be used as a blood agar base - for this purpose 7% of sterile blood should be added to the sterile molten medium which has been cooled to approximately 45°C. Tryptone Soya Agar can also be used for the preparation of `chocolate’ agar.
Since Tryptone Soya Agar contains no added carbohydrate it may be used, with added blood, in the determination of haemolysis. Horse blood agar plates prepared with Tryptone Soya Agar are used for the colicine typing of Shigella sonnei 1,2,3,4.
The Oxoid medium has also been used as a replacement for yeastrel-milk agar plates in the Lisboa test 5 and for bacterial counts on eviscerated poultry6.
When supplemented with 0.7g lecithin and 5g Polysorbate (Tween 80) per litre of Tryptone Soya Agar, the medium can be used as Microbial Content Test Agar for testing quaternary ammonium compounds7.
Tryptone Soya Agar is recommended as a reference medium when testing selective media, to measure the degree of inhibition8.
A medium for isolation of Bacteroides gracilis is prepared from Tryptone Soya Agar by adding formate, fumarate and nitrate. The medium is made selective using nalidixic acid and teicoplanin9.
Storage conditions and Shelf life
Store the dehydrated medium at 10-30°C and use before the expiry date on the label.
Store the prepared plates of medium at 2-8°C.

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