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Tergitol 7 Agar

[所属分类:培养基配方] [发布时间:2021-9-2] [发布人:网站管理员2] [阅读次数:] [返回]

Tergitol 7 Agar

山东拓普生物工程有限公司培养基配方 http://www.topbiol.com

Composition per liter:

Agar ............................................................................................ 15.0g

Lactose........................................................................................ 10.0g

Yeast extract.................................................................................. 3.0g

Pancreatic digest of casein............................................................ 2.5g

Peptic digest of animal tissue ....................................................... 2.5g

Tergitol 7....................................................................................... 0.1g

Bromthymol Blue .................................................................... 25.0mg

TTC solution..............................................................................3.0mL

pH 6.9 ± 0.2 at 25°C

Source: This medium is available as a premixed powder from BD Di

agnostic Systems.

TTC Solution:

Composition per 100.0mL:

Triphenyltetrazolium chloride ...................................................... 1.0g

Preparation of TTC Solution: Add triphenyltetrazolium chloride

to distilled/deionized water and bring volume to 100.0mL. Mix thor

oughly. Filter sterilize.

Preparation of Medium: Add components to distilled/deionized

water and bring volume to 997.0mL. Mix thoroughly. Gently heat and

bring to boiling. Autoclave for 15 min at 15 psi pressure–121°C. Cool

to 50°C. Aseptically add 3.0mL of sterile TTC solution. Mix thorough

ly. Pour into sterile Petri dishes or distribute into sterile tubes.

Use: For the selective isolation and differentiation of coliform bacteria

based on lactose fermentation. Lactose-fermenting bacteria appear as yellow

colonies. Lactose-nonfermenting bacteria appear as blue colonies.