Quality Control for Commercially Prepared Microbiological Culture Media Whether you are looking for the official CLSI M22-A3 PDF
Chocolate agar (for specific fastidious organisms like Neisseria gonorrhoeae ) Selective media for isolation of specific pathogens 3. Maintenance of Control Organisms
| Source | Format & Price | Direct Link / Notes | | :--- | :--- | :--- | | | PDF, US$180.00 | CLSI M22-A3 Page —Members receive significant discounts. | | ANSI Webstore | PDF, price varies | ANSI M22-A3 Page —An accredited standards distributor. | | Accuris (formerly Techstreet) | PDF, US$216.00 | Accuris M22-A3 Page —Offers multi‑user licenses and printed editions. | | Chinese National Digital Standard Library (NDLS) | Physical copy only | NDLS M22-A3 Page —The document is "currently in force" and available for viewing on‑site, but not for download. |
Sometimes, academic institutions, hospitals, or research organizations have subscriptions to these standards. You might have access through your institution. clsi m22a3 pdf link
If you are looking for specific quality control procedures or "exempt media" lists typically found in M22-A3, these public resources provide summaries and templates:
Streamlining Microbiology Labs: A Guide to CLSI M22-A3 For microbiology laboratories, maintaining high-quality results starts with the reliability of your culture media. One of the most critical documents guiding this process is CLSI M22-A3
To find information on CLSI M22-A3 , you can visit the official CLSI M22 Shop Page , where the document is titled | | Accuris (formerly Techstreet) | PDF, US$216
Note: CLSI standards are copyrighted materials and must be purchased from authorized sources.
The guideline creates clear boundaries between the testing responsibilities of media manufacturers, regional distributors, and clinical end-users.
The standard identifies "exempt" media that have proven reliability, meaning labs do not necessarily need to perform full retesting on every shipment. Established Failure Rates: It sets an acceptable failure rate cutoff of You might have access through your institution
Compliance with regulatory bodies—such as the Clinical Laboratory Improvement Amendments (CLIA), the College of American Pathologists (CAP), and the Joint Commission—requires strict adherence to current QC standards. Inspecting agencies will actively verify that your laboratory’s Standard Operating Procedures (SOPs) align with the precise definitions and tables laid out in CLSI M22-A3.
Using pirated regulatory documents can result in immediate failure during official laboratory accreditation audits. Conclusion
The CLSI M22-A3 standard has played a critical role in establishing a systematic, data-driven approach to quality control for microbiological culture media. While its application within the U.S. CLIA-regulatory framework has been superseded by more individualized plans like IQCP, it remains a vital and valid standard for international laboratories and a key reference for understanding the history and principles of media QC. Obtaining a legitimate PDF of this standard is the essential first step for any laboratory committed to best practices and reliable test results.