• Sabouraud Dextrose Agar with Lecithin, Tween 80, Histidine & Sodium Thiosulphate (VHP) (USP) - Irradiated This is a selective medium for the isolation of yeasts and fungi and is particularly suitable for use in sterility testing. The low pH (5.6) of the medium is inhibitory to most bacteria and many diagnostic features such as spores and pigmentation are well developed on this medium. The formulation of this medium conforms to the requirements of the United States Pharmacopoeia. Lecithin, Polysorbate 80 (Tween 80), Histidine and Sodium Thiosulphate are added to inactivate surface disinfectants (Lecithin neutralises quaternary ammonium compounds, Tween 80 and Histidine neutralises phenols, formalin, hexachlorophene and in combination with the Lecithin ethanol and Sodium Thiosulphate inactivate mercurials). This product is wrapped in barrier film to allow for use in Vaporised Hydrogen peroxide sterilisation systems. NB: Final sterilisation of this medium is by Gamma irradiation and it is triple wrapped. Dose Range: Min: 8.0kGy Max: 15.0kGy
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  • This is a selective medium primarily for the isolation and differentiation of coliforms and non-lactose fermenting Gram –ve bacterial species from clinical, dairy, industrial and water samples. This media differs from the original MacConkey formulation with the addition of an extra 0.5% Sodium chloride, an altered Bile salt mix and the neutral red concentration was also modified. This enhanced the effect of inhibiting Gram +ve and other non-enteric bacterial species. This medium conforms to the requirements of the Harmonised USP/EP/JP.
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  • This is a medium for determining the mutagenicity of a chemical reagent using the Ames Test. A histidine requiring strain (His -) of Salmonella typhimurium is inoculated into a mixture of salt agar, histidine solution and the test reagent, which is mixed and then used to overlay the media. Following incubation if the test reagent is mutagenic it will reverse the His- phenotype allowing growth to occur at a higher level than the control.
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