High grade dextrose tryptone agar is supplied by Micromaster. It is available in the form of a light yellow to greenish yellow homogeneous free flowing powder. For maximum efficiency, it must be stored below 30C in tightly closed container. It is recommended for the detection and enumeration of mesophilic and thermophilic aerobic microorganisms in foods.

Quantity provided: 500 g/pack

Dextrose Tryptone Agar, formulated by Williams is recommended for the detection and enumeration of thermophilic flat sour spoilage organisms. It is also recommended for general cultural studies by Cameron and other associations. This agar is also useful for enumeration of mesophiles and thermophiles in cereal and cereal products, dehydrated fruits, vegetables and spices. Inadequate heat processing is commonly responsible for flat-sour spoilage since spores of mesophilic bacteria are moderately resistant to moist heat. Organisms like Bacillus stearothermophilus, Bacillus coagulans( Bacillus thermoacidurans, a soil organism) are some of the organisms commonly associated with food spoilage.

Casein enzymic hydrolysate provides essential nutrients to the organisms. Dextrose serves as an energy source by being the fermentable carbohydrate while bromo cresol purple is a pH indicator. Acid producing organisms produce yellow colonies. While using the agar media, serially diluted test sample are mixed with the media in sterile Petri dishes. Standard procedures issued by various associations should be followed for testing of samples.