Clsi M22a3 Pdf -

Campylobacter agar, selective media for Neisseria gonorrhoeae (e.g., Thayer-Martin medium), and certain biochemical identification media.

A critical takeaway from the M22-A3 document is the distinction between media that require user testing and those that do not. Exempt Media (Streamlined QC)

If your lab is seeking (College of American Pathologists) or complying with CLIA '88 (Clinical Laboratory Improvement Amendments), adherence to CLSI M22-A3 is considered best practice and often mandatory.

If an exempt medium shows visual signs of deterioration (such as drying or discoloration), it must be discarded, and the failure should be reported to the manufacturer. clsi m22a3 pdf

The guideline mandates that before running any patient samples, the LC system must pass SST. Key parameters include:

The standard's list of media is not arbitrary; it is evidence-based. The media included in M22-A3 were derived from as part of its proficiency-testing program for clinical laboratories.

The document can be purchased directly from the Clinical and Laboratory Standards Institute official website (clsi.org) in both electronic (PDF) and print formats. If an exempt medium shows visual signs of

Even when utilizing exempt media, the laboratory cannot completely bypass quality checks. Under CLSI M22-A3, the user must:

It represented a shift toward a risk- and data-driven approach, using extensive proficiency testing data to allow labs to focus their resources on the most critical tasks. Today, its concepts inform the newer IQCP model and remain a valuable resource for international labs and for understanding the principles of efficient, evidence-based microbiological media quality control. The M22-A3 standard is a significant piece of clinical laboratory history, having been recognized by the FDA for its technical merit and now serving as an archived but valid resource for the community.

This is the most critical piece of information for any U.S. laboratory professional. . The media included in M22-A3 were derived from

Provide a or a statement of compliance with every shipment, confirming that the specific lot meets CLSI M22-A3 criteria. User Laboratory Responsibilities

It ensures that every batch of media—whether agar plates, broths, or slants—supports the growth of target pathogens while inhibiting commensal flora as intended.

Logs for physical inspection of incoming media are up to date.