RAPID'Listeria spp. Chromogenic Medium
RAPID'Listeria spp. is a selective chromogenic agar producing distinctive blue-green Listeria colonies against a white background, enabling easy visual detection of Listeria species in food and environmental samples within 48 hours.
Overview
Listeria detection in food manufacturing environments requires reliable differentiation of Listeria colonies from background flora. RAPID'Listeria spp. Medium uses β-D-glucosidase activity to produce blue to blue-green Listeria colonies against a whitish agar background, making identification straightforward. Selective agents (lithium chloride and antibiotic mixture) inhibit Bacillus and other interfering flora. The medium can also be used to confirm positive results from iQ-Check Listeria spp. PCR testing.
Technical specifications
- Technology: chromogenic agar based on β-D-glucosidase detection
- Target: Listeria spp. (all species)
- Colony appearance: Listeria = blue to blue-green; background agar = whitish
- Selectivity: lithium chloride + antibiotic mixture inhibits Bacillus and interfering flora
- Time to results: 48 hours (24 hr enrichment + 24 hr incubation)
- Validation: NF VALIDATION per ISO 16140
- Formats: dehydrated agar base (with supplements) and ready-to-use plates
- Confirmation: single-spot on RAPID'L.mono agar + Gram and catalase tests
Technology readiness level
TRL 9 — established chromogenic medium with international certification.
About Bio‑Rad Laboratories
Bio-Rad Laboratories is a global developer, manufacturer, and marketer of specialized products for the life science research and clinical diagnostics markets. The company provides a comprehensive suite of instruments, reagents, quality control solutions, and data analysis tools that support complex biological study, diagnostic accuracy, and process management. By operating a global network of research, development, and manufacturing facilities, Bio-Rad enables the transformation of experimental questions into actionable scientific and clinical outcomes.
These solutions are critical for universities, research institutions, hospitals, biopharmaceutical companies, and food safety laboratories seeking to advance scientific discovery and improve patient healthcare. Their products assist in diverse applications including bioprocessing, drug discovery, genomics, and various clinical diagnostic tests. With over 70 years of industry presence, the company serves as a vital partner for researchers and clinicians who rely on high-quality, standardized tools to ensure reliable results, advance medical understanding, and ultimately save lives.
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