Staphylococcus · QC reference strain
Staphylococcus aureus Quantitative QC Strain – reference strain for media testing
The Staphylococcus aureus Quantitative QC Strain contains a defined number of S. aureus CMCC 26003 cells (110–1100 CFU per vial). After rehydration, 0.1 mL gives 10–100 CFU, the inoculum needed for growth-promotion tests.
- Lyophilised, single use
- For growth-promotion and controls
- Rehydration fluid included
How Staphylococcus aureus Quantitative QC Strain is used
Add 1.1 mL of the supplied rehydration fluid, shake for 5 seconds and inoculate 0.1 mL directly. No dilution series is needed, which saves time and reduces errors.
Technical data
| Preparation | Add 1.1 mL rehydration fluid, shake 5 s → 10-100 cfu per 0.1 mL; inoculate 0.1 mL and spread |
| Storage | ≤ -18 °C; after rehydration 2-8 °C, use within 8 h |
| Shelf life | 18-24 months |
Applications and practical notes
Reference strains of staphylococci are used for growth-promotion and selectivity testing of culture media according to ISO 11133 and for positive and negative controls in routine methods. Typical applications include:
- Growth-promotion testing of new media lots
- Positive and negative controls for staphylococcal methods
- Proficiency and method-verification studies
- Pharmacopoeial microbial limit tests
Working with Staphylococcus aureus Quantitative QC Strain: Store unopened vials at −18 °C or below and use the rehydrated suspension within 8 hours.
Good practice with rapid tests: store the kit as stated on the label, let the components reach room temperature before use and use each item only once. Record the lot number and the result, and confirm positive results according to the reference method when this is required.
About the Staphylococcus aureus methods: coagulase-positive staphylococci in the food chain are counted on Baird-Parker Agar according to ISO 6888-1, and typical colonies are confirmed with the coagulase test. For low numbers, ISO 6888-3 uses an MPN technique with Giolitti-Cantoni Broth, and the FDA BAM Chapter 12 describes direct plating and an MPN method with Tryptic Soy Broth containing 10 % NaCl. In pharmaceutical microbiology, the test for S. aureus in EP 2.6.13 and USP <62> uses Mannitol Salt Agar. COLO.Science offers media, supplements, rapid tests, identification kits and QC strains for every step.
Complete sets from one supplier: COLO.Science supplies culture media, supplements, rapid tests, identification kits and QC strains as complete sets for the method you follow. Send us your sample types and standards, and we will prepare an offer with the matching products and documentation.
Staphylococcus aureus Quantitative QC Strain is supplied by COLO.Science in the pack sizes listed under Ordering information. For larger quantities, regular deliveries or method-specific sets that include Staphylococcus aureus Quantitative QC Strain, please send us a request. With every delivery of Staphylococcus aureus Quantitative QC Strain you receive the lot number and expiry date, and on request we send the available documentation for Staphylococcus aureus Quantitative QC Strain.
Where Staphylococcus aureus Quantitative QC Strain fits in Staphylococcus aureus testing
- Colony count – Baird-Parker Agar with Egg Yolk Tellurite Emulsion (ISO 6888-1); alternatives: chromogenic S. aureus agar or Vogel-Johnson Agar
- Low numbers (MPN) – Giolitti-Cantoni Broth (ISO 6888-3) or Tryptic Soy Broth with 10 % NaCl (FDA BAM), then plating on Baird-Parker Agar
- Confirmation – coagulase test with Rabbit Plasma, latex kit or DNase Agar
- Pharmaceutical products – Mannitol Salt Agar for the S. aureus test of EP 2.6.13 / USP <62>; QC strains for media testing
See the complete Staphylococcus set in the Microbiology Catalogue →
Ordering information
| Product | COLO code | Pack |
|---|---|---|
| Staphylococcus aureus Quantitative QC Strain 10^3 (CMCC 26003) | PRO7874 | 1 vial |
Product notice: preparation, storage conditions and shelf life are given on the label. Technical data on this page are for orientation; the label and the lot documentation apply. B2B prices are quoted net, excluding VAT.
Sales and technical support
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Quotations and technical support for culture media and microbiology products across our international sales territory. B2B prices are net, excluding VAT.
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Need the complete set for your method?
Send the sample type, target organism and the standard you follow. COLO.Science will put together the media, supplements, QC strains and confirmation tests for the whole procedure.
