Provides the M22-A3 PDF with Digital Rights Management (DRM) protection.

Here, the standard details the historical context of the NCCLS Subcommittee on Media Quality Control, which was formed in 1984. It also describes the CAP surveys that provided the data for the media categorization.

Test for using negative control organisms that should be inhibited.

The guidance provided in M22-A3 does not replace the need for an IQCP. Nevertheless, M22-A3 may still be applicable to that operate under different regulatory frameworks. Additionally, the standard is still recognized by the FDA for certain regulatory requirements.

All QC results must be logged. If a medium batch fails any parameter, the entire lot must be rejected, and the failure must be reported to the manufacturer. Evolution and the Transition to M22-A4