Oxoid™ Brilliance™ Listeria Agar (ISO) 500g

Oxoid™ Brilliance™ Listeria Agar (ISO) (500g) is a selective chromogenic medium used for the isolation, enumeration, and presumptive identification of Listeria species, including Listeria monocytogenes, from food and environmental samples. Developed in accordance with ISO 11290-1:2017 and ISO 11290-2:2017 standards, the medium differentiates Listeria spp. by X-glucoside hydrolysis, producing blue-green colonies. L. monocytogenes and L. ivanovii are further distinguished by lecithinase activity, visible as an opaque white halo around colonies.

Key Features:

• Form: Dehydrated powder
• Weight: 500g
• Application: Isolation, enumeration, and presumptive identification of Listeria spp. and L. monocytogenes from food and environmental samples, compliant with ISO 11290-1:2017 and ISO 11290-2:2017
• Composition: Chromogen X-glucoside with selective agents (lithium chloride, polymyxin B, nalidixic acid) to inhibit competing flora; amphotericin to suppress yeasts and molds; requires supplementation with Selective Supplements
• Preparation: Suspend the base medium in distilled water, sterilize, then aseptically add Selective Supplements before pouring plates
• Yield: Approximately [X litres]* of prepared medium per 500g (specify per manufacturer’s instructions)
• Storage: Store dehydrated medium at 10–30°C, protected from moisture and light
• Compliance: Validated as part of Thermo Scientific™ Listeria Precis™ Methods according to ISO 16140-2; conforms to ISO 11290-1:2017 and ISO 11290-2:2017 reference methods