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Sigma-Aldrich™ Vitroids™ Listeria monocytogenes Serovar 4b WDCM 00021 (10/pk)
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Specifications:
| Application | Microbiology | ||
| Storage Temperature | -20°C | ||
| Product Type | Reference Strains | Forms | Freeze Dried |
| Product Brand | Sigma-Aldrich | ||
| Product Grade | Microbiology grade | ||
The Sigma-Aldrich™ Listeria monocytogenes serovar 4b WDCM 00021 Vitroids™ is a high-quality certified microbiological reference material (CRM) designed for reliable quantitative and qualitative quality control in microbiology laboratories.
Supplied as ready-to-use Vitroids™ discs, each unit delivers a controlled microbial load of 1,000–10,000 CFU, eliminating the need for culture maintenance, dilution, or pre-enrichment. This ensures consistency, traceability, and regulatory compliance across routine testing workflows.
Manufactured under strict ISO 17034 and ISO/IEC 17025 accreditation, this CRM guarantees accuracy, reproducibility, and traceability, making it ideal for laboratories operating in regulated environments.
Key Features
- Certified Reference Material (CRM) for microbiological QC
- Defined CFU range: 1,000–10,000 CFU per disc
- Ready-to-use format – no dilution or preparation required
- Rapid rehydration: ready in ~10 minutes
- Long-term stability: up to 2–3 years at −20°C
- Traceable authenticated strain (CECT® origin)
- ISO 17034 & ISO/IEC 17025 certified production
- Eliminates need for in-house culture maintenance
- Includes Certificate of Analysis (CoA)
- Robust and temperature-resistant formulation
- Designed as a Design for Sustainability (DfS) product
Applications
This CRM is widely used for:
- Routine microbiological quality control
- Method validation and verification
- Proficiency testing programs
- Food and beverage microbiology testing
- Water and environmental monitoring
- Detection and confirmation of Listeria spp.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Certified Microbiological Reference Material |
| Organism | Listeria monocytogenes serovar 4b |
| Strain ID | WDCM 00021 |
| Format | Vitroids™ discs (solid) |
| CFU Range | 1,000–10,000 CFU/disc |
| Pack Size | 10 discs |
| Certification | ISO 17034, ISO/IEC 17025 |
| Shelf Life | Limited (see label), typically 2–3 years |
| Storage Temperature | −20°C |
| Application | Microbiology QC |
| Manufacturer | Sigma-Aldrich Production GmbH, Switzerland |
| Traceability | Derived from CECT® culture |
Unique Advantages
- Regulatory confidence: Fully compliant with international standards
- Operational efficiency: Eliminates culture preparation steps
- Consistency: Reduces variability between tests and operators
- Cost-effective: Minimizes labor and contamination risks
- Audit-ready documentation: Complete traceability and certification
Important Usage Notes
- Intended strictly for laboratory quality control and validation use
- Not permitted for commercial propagation, distribution, or resale
- Ensure proper handling and storage at −20°C to maintain integrity
The Sigma-Aldrich™ Listeria monocytogenes serovar 4b Vitroids™ CRM is a highly reliable, ready-to-use microbiological standard that enhances laboratory efficiency, ensures compliance, and delivers consistent quality control performance.
It is an essential solution for modern microbiology laboratories seeking accuracy, traceability, and operational simplicity in pathogen testing workflows.