Comparison of compendial antimicrobial effectiveness tests: a review

Area of Science:

• Microbiology
• Pharmaceutical Sciences
• Regulatory Science

Background:

• The antimicrobial effectiveness test (AET) is crucial for sterile parenteral multi-dose products.
• Existing tripartite compendia (e.g., USP, Ph. Eur., JP) have harmonized test execution but not acceptance criteria.
• This lack of harmonized criteria complicates compliance for manufacturers.

Purpose of the Study:

• To describe a single antimicrobial effectiveness test procedure.
• To ensure the described procedure satisfies the acceptance criteria of all major tripartite compendia.
• To provide a unified approach for preservative effectiveness testing.

Main Methods:

• A detailed procedural description of a single AET is provided.
• The method's compatibility with inoculum preparation and test execution across compendia is highlighted.
• The procedure is designed to meet the distinct acceptance criteria of the USP, Ph. Eur., and JP.

Main Results:

• The proposed single test method procedurally satisfies all tripartite compendia.
• This unified approach allows for a single test execution to meet diverse regulatory requirements.
• It simplifies the process of demonstrating preservative effectiveness for sterile parenteral products.

Conclusions:

• A harmonized antimicrobial effectiveness test is achievable.
• Implementing this single test procedure can reduce testing redundancy and improve compliance efficiency.
• This approach supports global regulatory harmonization for pharmaceutical product safety.