Dextrose Tryptone Agar (Powder)

Detection of thermophilic, aerobic organisms in foods.

Description:
Dextrose Tryptone Agar is recommended for the determination of mesophilic and thermophilic bacteria in sweetening agents used in frozen desserts. Bromcresol purple is used as a pH indicator. When isolating thermophilic bacteria use 55°C as a plating temperature.

Storage and Stability:
Store powdered media at 4°C. Opened bottles should be capped tightly. Protect it from moisture and light. Prepared media should be kept at 4°C and used within a short period of time.

Appearance:
Light greenish-beige, homogeneous, free flowing powder.

Solubility:
Purple, clear to turbid.

pH (25°C):
6.7±0.2

Microbiological Analysis:
Bacillus coagulans ATCC 7050: Growth yellow colonies
Bacillus stearothermophilus ATCC 7953: Growth yellow colonies

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.