The laboratory must maintain documentation showing that the manufacturer is compliant with CLSI M22-A3 standards and has provided a Certificate of Quality Control for that specific lot.
The standard provides essential information to both manufacturers and end-users on how to manage the quality control of commercially prepared culture media. It was designed to alleviate the substantial financial burden that routine quality control imposes on licensed microbiology laboratories. The fundamental premise of the standard is that retesting commercially prepared microbiological culture media is unnecessary for those media that have proven to be of reliable quality.
The third CAP survey, conducted in the fall of 2001, evaluated , comprising 32,702,833 plates, tubes, or bottles —a truly massive dataset that gave the standard its statistical backbone. The findings and key changes in M22-A3 include:
By implementing the guidelines within the standard, laboratories can justify reducing their QC workload. Instead of testing every single batch of standard agar plates, they can rely on the manufacturer's certificate, provided they maintain flawless records of inventory checks and storage temperature logs. Why Professionals Search for the CLSI M22-A3 PDF clsi m22a3 pdf
When you hold the official CLSI M22-A3 document—whether as a PDF on your lab computer or a printed manual—you hold the key to defensible, high-quality microbiology results. Don't compromise your lab's integrity with unauthorized copies. Invest in the standard, and your results will stand up to any audit.
Even when utilizing "exempt" media, a clinical laboratory cannot simply place the media directly into service without any oversight. The laboratory must perform the following:
The Clinical and Laboratory Standards Institute (CLSI) is a non-profit organization that develops standards through global consensus. Because generating these standards requires immense research and expert collaboration, CLSI operates on a paid-access model. The laboratory must maintain documentation showing that the
Practical implementation in clinical labs
Through extensive multi-center studies, CLSI determined that certain types of commercially prepared media have exceptionally low failure rates (often less than 0.1%). Under M22-A3, if a laboratory purchases these media from a manufacturer that certifies compliance with CLSI standards, the laboratory is from performing full, routine microbial performance testing on those batches. Examples of typically exempt media include: Sheep Blood Agar (SBA) MacConkey Agar (MAC)
If you have landed on this article searching for the , you are likely a: The fundamental premise of the standard is that
If you purchase the single-user PDF, you are typically allowed to print one copy for internal use. Check the CLSI license agreement. Do not scan and share the PDF with other labs.
The standard can be purchased directly from the Clinical and Laboratory Standards Institute website as an electronic PDF or print document.
: Ensuring no unintended microbial growth occurs during incubation.