RM09750L

Citrobacter freundii NCTC 9750 Low count LENTICULE^® discs

30-120 CFU, suitable for microbiology, reference material, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland

• Synonym(s): C. freundii NCTC 9750 Low count Lenticule^® discs, Certified reference material, Microbiological standards
• UNSPSC Code: 41116107
• NACRES: NA.24

Properties

• grade: reference material
• Quality Level: 200
• Agency: ISO 17034; ISO/IEC 17025
• form: disc (hydrosoluble); solid
• shelf life: limited shelf life, expiry date on the label
• packaging: pack of 10
• manufacturer/tradename: Manufactured by: Sigma-Aldrich Production GmbH, Switzerland
• application(s): environmental; food and beverages; microbiology
• storage temp.: −20°C
• suitability: Citrobacter freundii; Citrobacter spp.

Description

General description

Citrobacter freundii NCTC 9750 Low count Lenticule^® discs are Microorganisms Standards (Microbiological Reference Materials) which can be used as quantitative and qualitative control organisms. They contain colony forming units (CFUs) in the range of 500-50000 CFU per disc. The technology allows long-term conservation and renders the organisms resistant to temperature changes. They are intended to be used as daily internal quality control organisms.

These microorganisms are produced under reproducible conditions using authenticated strains from NCPF. These ready-to-use microbiological controls minimize the need for maintaining control strains in the test laboratory and guarantee the use of an authenticated control culture for every quality control test.

Lenticule^® discs are prepared from a traceable culture obtained freeze-dried from the National Collection of Type Cultures (NCTC) or National Collection of Pathogenic Fungi (NCPF) and are manufactured by Sigma-Aldrich under license from UK Health Security Agency.

Application

Citrobacter freundii NCTC 9750 Low count Lenticule^® discs are used as reference strains in routine quality control for food, beverage, water, and environmental testing. Additionally, they are excellent for use in method development and validations, as starter cultures, and for research studies and educational purposes.

Features and Benefits

• Ready-to-use at convenient CFU ranges
• No dilution required
• Quick rehydration in 10 minutes
• At least 16 months of shelf life in a standard -20 °C freezer
• Complete with a comprehensive certificate of analysis
• No maintenance of stock cultures
• No recovery time or pre-enrichment step is necessary
• Robust, efficient, and reliable
• Easy-to-use
• Cost-effective

Other Notes

Strain origin: NCTC 9750

Other cell culture collections:

• DSM 30039
• ATCC^® 8090
• CECT^® 401

Click here to access the BacDive database for more info on metabolism, genome, growth media, and more

Strain History - Accessioned into the NCTC in 1953 < American Type Culture Collection (as ATCC 8090) < CH Werkman. Isolation substrate unknown, geographic orgin unknown, before 1954.

Legal Information

ATCC is a registered trademark of American Type Culture Collection

CECT is a registered trademark of Universitat de Valencia

Lenticule is a registered trademark of The Secretary of State for Health (United Kingdom)

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3