Thermo Scientific™ Dextrose Tryptone Broth (Dehydrated)

Description

• Cultivate and detect organisms causing spoilage in canned foods and other products with Thermo Scientific™ Oxoid™ Dextrose Tryptone Broth (Dehydrated)
• Organisms which produce acid from dextrose, such as Bacillus stearothermophilus and other 'flat-sour' organisms, are detected by the color change of the medium from purple to yellow
• Canned foods are more often prone to flat sour spoilage due to contamination by either mesophilic or thermophilic aerobic spore formers
• Dextrose Tryptone Broth is recommended by the American Public Health Association 1 and Baumgartner and Hersom 2 for the bacterial examination of low and medium acid canned foods (pH 4.5 and above)
• Both methods include inoculation of 10mL amounts of the broth with one or two grams of the food product
• For food products in this pH range, the suggested procedure is aerobic cultivation in Dextrose Tryptone Broth in parallel with anaerobic cultivation in other media.