Clsi M22a3 Pdf Jun 2026

Maintain viable stock cultures of required ATCC strains (e.g., Staphylococcus aureus , Escherichia coli , Pseudomonas aeruginosa ) for testing non-exempt batches.

One of the most practical features of the CLSI M22-A3 document is its classification of media into two distinct categories based on their historical reliability data. 1. Exempt Media (Low Failure Rate)

Identify which specific from retesting.

Non-Exempt media are complex formulations or highly selective media that possess a higher inherent risk of failure, deterioration during transport, or failure to support fastidious organisms. Laboratories on every new lot or shipment of non-exempt media before using them for clinical diagnostics. Common examples of non-exempt media include: Campylobacter Agar

Manufacturers must produce media according to strict quality systems, testing every lot for sterility, growth performance, and selectivity before shipping. clsi m22a3 pdf

If you purchase the single-user PDF, you are typically allowed to print one copy for internal use. Check the CLSI license agreement. Do not scan and share the PDF with other labs.

The standard is highly structured, offering actionable instructions for everyday laboratory operations. The document primarily focuses on three core areas: 1. Responsibilities of the Manufacturer Maintain viable stock cultures of required ATCC strains (e

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

The standard defines an acceptable failure rate as ≤0.5% . Exempt Media (Low Failure Rate) Identify which specific

Quality control (QC) in the microbiology laboratory is foundational to accurate patient diagnosis. At the center of this process is the Clinical and Laboratory Standards Institute (CLSI) document , titled "Quality Control of Microbiological Culture Media; Approved Standard—Third Edition."