Clsi M22a3 Pdf Jun 2026

CLSI M22-A3, "Quality Control for Commercially Prepared Microbiological Culture Media," establishes protocols for testing ready-to-use media, emphasizing an acceptable failure rate of ≤0.5% for exempt media. While it defines responsibilities for QC, U.S. laboratories have transitioned from these exemptions to Individualized Quality Control Plans (IQCP). Purchase the document through the CLSI Shop .

Here is the most important section for anyone who typed into a search engine hoping for a free download.

Use the standard to establish rigorous QC protocols for every lot. clsi m22a3 pdf

| | Potential Outcome | |-----------|----------------------| | No documented media QC | CLIA deficiency – possible suspension of microbiology testing | | Using outdated M22-A2 | CAP accreditation citation – requires immediate corrective action | | Pirated or photocopied PDF | Copyright violation – legal action from CLSI; citation for not having official standard | | Incorrect QC strains | Undetected media failure – false patient results leading to harm |

Yes. The standard requires lot-level testing per manufacturer. Different manufacturers may use different formulations or production processes, so performance can vary. Purchase the document through the CLSI Shop

This core section details:

The standard explicitly applies to , ready-to-use microbiological culture media. It does not cover media prepared entirely in-house from raw ingredients (though those labs may still use it as a reference). Intended users include clinical labs, public health labs, veterinary diagnostics, and industrial microbiology facilities. guaranteed latest version (active standard)

store.clsi.org Price: Typically $150–$250 USD for a single-user PDF (varies by membership status). Format: Secure, watermarked PDF with printing restrictions for one user. Advantages: Immediate access, guaranteed latest version (active standard), and proof of ownership for auditors.