The CLSI M22-A3 document is . It is not legally available for free download from unauthorized websites, file-sharing platforms (e.g., Scribd, Academia.edu, or random lab FTP servers). Using a pirated PDF during an inspection (CAP, ISO, CLIA) can lead to:

The primary objective of M22-A3 was to establish standardized criteria for manufacturers to validate the performance of commercial QC strains and for laboratories to verify these materials upon receipt. It focused on ensuring that reference strains (e.g., Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 25923) used for daily or weekly QC produce results within acceptable limits (zones of inhibition or MICs) as defined by CLSI M100.

You may find M22-A2 PDFs online for historical reference. However, (A3). Using an outdated version will result in non-conformities during audits.

: A critical section identifying specific media that do not require routine user quality control because they have a proven failure rate of .