Clsi M22a3 Pdf May 2026

An additional 27 media were added to the "exempt" list, meaning labs can bypass routine QC organism testing for these items.

Quality Control for Commercially Prepared Microbiological Culture Media

Includes new recommendations for QC of media used to recover difficult-to-grow pathogens. Laboratory Inspection Requirements clsi m22a3 pdf

Cracked petri dishes, unequal filling, or hemolysis in blood agars.

M22-A3 introduced several significant changes from the previous M22-A2 version based on extensive surveys by the : An additional 27 media were added to the

The acceptable failure rate cutoff for exempting media was increased from 0.3% to 0.5% .

Excessive moisture, dehydration, or frozen/melted agar. Contamination: Any visible growth or excessive bubbles. Purchasing and Access Purchasing and Access The standard, titled "Quality Control

The standard, titled "Quality Control for Commercially Prepared Microbiological Culture Media; Approved Standard—Third Edition," provides a framework for both manufacturers and laboratory users to ensure the reliability of ready-to-use culture media. Published in 2004, it serves as a consensus-based guide for maintaining quality assurance in clinical microbiology. Key Purpose and Scope