Triple Sugar Iron Agar (Agar Medium M)-E-500g
- Brand: Micromaster
- Catalog No.: DM254E-500g
- Quantity/Unit: 500g/Pack
- Usually Shipped in: 1-2 Weeks
Min Orderable Qty : 1 Pack
For lab/research use only, unless otherwise specified
High grade Triple Sugar Iron Agar (Agar Medium M) is supplied by Micromaster. It is available in the form of a light yellow to pink homogenous free flowing powder. It is advisable to store this product below 30C.
- Quantity provided: 500 g/pack
Triple Sugar Iron Agar Medium is recommended for identification of gram-negative enteric bacilli on the basis of dextrose, lactose and sucrose fermentation and hydrogen sulphide production in accordance with EP. Triple Sugar Iron Agar was originally proposed by Sulkin and Willett and modified by Hajna for identifying Enterobacteriaceae. This medium complies with the recommendation of Indian Pharmacopoeia for the identification of Gram-negative bacilli. Peptone, yeast extract and beef extract provide nitrogenous compounds, sulphur, trace elements and vitamin B complex etc. Sodium chloride maintains osmotic equilibrium. Lactose, sucrose and dextrose monohydrate are the fermentable carbohydrates. Sodium thiosulphate and ferric or ferrous ions make H2S indicator system. Sodium thiosulphate is also an inactivator of halogen and can minimize its toxicity in the testing sample, if any during microbial limit tests. Phenol red is the pH indicator. Growing bacteria also form alkaline products from the oxidative decarboxylation of peptone and these alkaline products neutralize the large amounts of acid present in the butt. Gas production (CO2) is detected by the presence of cracks or bubbles in the medium, when the accumulated gas escapes. Thiosulphate is reduced to hydrogen sulphide by several species of bacteria and H2S combines with ferric ions of ferric salts to produce the insoluble black precipitate of ferrous sulphide.
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