are often "exempt" from routine user re-testing, provided the user performs a visual inspection for defects. Visual Inspection Criteria: Users must check for physical imperfections, including: Cracked petri dishes or agar. Unequal filling or insufficient agar depth ( Excessive bubbles, rough surfaces, or contamination. Hemolysis of blood-containing media. Significant color changes or precipitates. Failure Thresholds:
The official CLSI website offers the PDF and print versions for purchase. clsi m22a3 pdf free
The CLSI M22-A3 standard, titled "Quality Control for Commercially Prepared Microbiological Culture Media," are often "exempt" from routine user re-testing, provided
: Establish protocols for testing non-exempt media, including specific organisms to use, incubation conditions, and expected results. Ensure Accuracy Hemolysis of blood-containing media
is a protected clinical standard published by the Clinical and Laboratory Standards Institute (CLSI). Understanding CLSI M22-A3
: The full 44-page standard is available for purchase in electronic format via the CLSI Shop.