A cornerstone of this standard is the identification of "exempt" media. These are commercially prepared media with a proven history of high reliability and low failure rates (cutoff

Must document the receipt and physical condition of every shipment (e.g., checking for cracked plates, hemolysis, or contamination) and perform required QC for non-exempt media. Accessing the PDF

The CLSI M22-A3 standard is the third edition of the M22 series, replacing the previous M22-A2 version. Its primary goal is to establish quality assurance procedures that streamline laboratory operations while maintaining high diagnostic accuracy.

The primary source for the M22 document and its updates.

Must ensure proper storage and handling during transit to maintain media integrity.