U.S. flag An official website of the United States government
  1. Home
  2. Food
  3. Science & Research (Food)
  4. Laboratory Methods (Food)
  5. BAM Media M13: Andrade's Carbohydrate Broth and Indicator
  1. Laboratory Methods (Food)

BAM Media M13: Andrade's Carbohydrate Broth and Indicator

January 2001

Beef extract 3 g
Peptone or gelysate 10 g
NaCl 10 g
Distilled water 1 liter

Adjust pH to 7.2 ± 0.2. Autoclave 15 min at 121°C.

Andrade's indicator

Acid fuchsin * 0.2 g
1 N NaOH 16 ml
Distilled water 84 ml

Allow to decolorize before use. Add 1-2 ml NaOH if necessary. Add 10 ml indicator to 1 liter base.

* Acid fuchsin is a potential carcinogen. Avoid inhalation and contact with skin.

Carbohydrate stock solution.

Prepare dextrose, lactose, sucrose, and mannitol in 10% solutions. Prepare dulcitol, salicin, and other carbohydrates in 5% solutions. Sterilize by filtration through 0.20 µm membrane. Dilute sugar solutions 1:10 in base with Andrade's indicator to give recommended concentration. Mix gently.


Original Source: Bacteriological Analytical Manual, 8th Edition, Revision A, 1998.