Thermo Scientific™ Dextrose Tryptone Agar (Dehydrated)

Description

• Detect and enumerate flat-sour thermophiles and mesophiles in food products with Thermo Scientific™ Oxoid™ Dextrose Tryptone Agar (Dehydrated)
• The medium, evolved as a result of several years of research by Williams 1 is most suitable for the cultivation and enumeration of the thermophilic bacteria causing flat-sour spoilage of canned food
• Canned foods are more often prone to flat sour spoilage due to contamination by either mesophilic or thermophilic aerobic spore formers
• Dextrose Tryptone Agar is a bacteriologically controlled medium for the detection and enumeration of thermophilic and mesophilic organisms in food products
• Its use for routine cultural purposes is recommended by Cameron 2 and the Association of Official Analytical Chemist 3
• Dextrose Tryptone Agar is also recommended by: Tanner 4 for the examination of canned food, sugar, and starch for thermophilic bacteria of the Bacillusstearo thermophilus type (i.e
• flat-sour spoilage bacteria)
• The American Public Health Association 5 for the enumeration of mesophilic and thermophilic aerobic bacteria in sweetening agents used in frozen dairy foods
• The National Canners Association6 for determination of the total plate and flat-sour count of thermophilic bacteria spores in ingredients, such as sugar and starch
• The American Public Health Association 7 for the enumeration of mesophilic organisms and flat-sour spores in sugars, starches and other complex carbohydrates; and for the enumeration of flat-sour thermophiles in cereals and cereal products, dehydrated fruits and vegetables, and spices
• Baumgartner and Hersom 8 for the examination of low and medium-acid canned food (above pH 4.5) for flat-sour thermophiles, mesophilic aerobes, and facultative anaerobes Not all products are available for sale in all territories
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• Remel™ and Oxoid™ products are now part of the Thermo Scientific brand