MAST® Sobigel Agar is purified and clarified using a specialised ion-exchange process. This treatment provides high gel strength, excellent clarity, no inhibition of bacterial growth and effective antibiotic diffusibility.

MAST® Sodium Desoxycholate is a highly purified bile acid derived from deconjugated bile salts. It is water-soluble, producing a clear, colourless solution, and is precisely standardised to provide effective inhibition of non-enteric species.

MAST® Agar A is purified and clarified using a specialised ion-exchange process. This treatment provides high gel strength, excellent clarity, no inhibition of bacterial growth and effective antibiotic diffusibility.

MAST® Bacteriological Peptone is a high-grade enzymatic digest of meat supplied as a light brown granular powder. It is a rich source of amino acids and vitamins, supporting excellent growth of fastidious organisms in suitable media. Free from fermentable carbohydrates, it is suitable for biochemical testing media. Its high tryptophan content also allows use in the demonstration of indole production.

MAST® Beef Extract is supplied as a powder that produces a neutral solution when reconstituted. At typical media preparation concentrations (<1%), it forms a clear, precipitate-free medium when used with other MAST® Media Raw Materials.

A refined preparation of bile salts used in the formulation of selective media such as MacConkey agars and MacConkey broth. MAST® Bile Salts provide effective inhibitory properties.

MAST® Acid Hydrolysate of Casein is rich in amino acids and essential mineral salts but low in vitamins. It is used in the preparation of MAST® Muller Hinton Agar. The product is produced by hydrolysing casein with hydrochloric acid under pressure, followed by neutralisation with sodium hydroxide.

MAST® Enzymic Hydrolysate of Casein is a tryptic digest of casein. Enzymatic digestion is less severe than acid hydrolysis, producing a hydrolysate rich in amino acids and vitamins, although the nitrogen components are less precisely defined. Its high tryptophan content makes it suitable for indole production tests. Free from fermentable carbohydrates, it can be used in growth media for biochemical studies and may substitute for peptone in most formulations.

MAST® Peptone B is a highly nutritious, general-purpose peptone for use with other culture media components. Developed to meet many of the needs of clinical bacteriology laboratories, it is a balanced formulation with consistent batch-to-batch performance. It supports the growth of fastidious organisms such as streptococci, pneumococci and Haemophilus spp., and is free from fermentable carbohydrates.

MAST® Yeast Extract should be added to culture media at the appropriate concentration together with other components such as meat extracts, peptones and agar, according to the required formulation.