Visual inspection; full microbiological verification using ATCC strains.
It is important to note that CLSI documents are proprietary intellectual property. Official Purchase
– The official source: https://clsi.org/standards/products/microbiology/documents/m22/ (Title: Quality Control for Commercially Prepared Microbiological Culture Media; Approved Standard — Third Edition ) clsi m22a3 pdf free
Free downloads often contain missing pages, poor scans, or outdated revisions. Using inaccurate specifications can cause a laboratory to fail external audits (such as CAP, COLA, or ISO 15189 inspections).
Many clinical laboratory professional societies negotiate access to CLSI standards as part of their membership benefits. These may include: Using inaccurate specifications can cause a laboratory to
The M22-A3 standard identifies specific media types that are considered "exempt" from routine, daily retesting by the end-user, provided the manufacturer’s QC is documented. Examples include: Standard blood agar plates. Common nutrient agars. Certain types of broth media.
Instead, CMS now mandates a different approach. All laboratories are required to either: Examples include: Standard blood agar plates
CLSI M22A3 is a guideline document that provides standards for antimicrobial disk susceptibility testing, which is a critical component of clinical microbiology laboratory testing. The document outlines the procedures for performing disk diffusion tests to determine the susceptibility of bacteria to antimicrobial agents. The guidelines cover various aspects of testing, including disk preparation, inoculum preparation, incubation conditions, and interpretation of results.
The primary function of M22-A3 is to provide quality assurance procedures for manufacturers and laboratory users of ready-to-use culture media. Key features include: Exempt Media List:
The precise American Type Culture Collection (ATCC) strains to use for testing.
Visual inspection; verify manufacturer's certificate of compliance.