MacConkey HiVeg™ Agar Base is recommended for studying carbohydrate fermentation reactions of coliforms by adding carbohydrates either individually or in combination. The selective action of this medium is attributed to bile salts and crystal violet, which are inhibitory to most of the species of gram-positive bacteria. Gram-negative bacteria usually grow. This medium is prepared by replacing animal peptones with vegetable defined peptones to avoid BSE/TSE/GMO risk. well on the medium and are differentiated by their ability to ferment carbohydrates.
- Appearance: light yellow to pink homogeneous free flowing powder
- Gelling: firm comparable with 1.35% agar gel
- Colour and clarity of prepared medium: Red with purplish tinge clear to slightly opalescent gel forms in petri plates
- Reaction of 4.0% w/v aqueous solution at 25°C. pH : 7.1±0.2
- cultural response: cultural characteristics observed with added 1% lactose, after an incubation at 35-37°C for 18-24 hours