Considerations for the Validation of Non-CFU Based Bio-Fluorescent Particle Counting Technologies

Area of Science:

• Microbiology
• Analytical Chemistry
• Pharmaceutical Science

Background:

• Bio-Fluorescent Particle Counting (BFPC) is an emerging non-growth-based technology for microbial detection.
• Pharmaceutical industry interest in BFPC for water and cleanroom air monitoring is growing.
• BFPC methods report results in units other than colony-forming units (CFUs), posing validation challenges.

Purpose of the Study:

• To provide recommendations for validating non-growth-based BFPC technologies.
• To address challenges in validating alternative microbial methods compared to traditional growth-based methods.
• To offer guidance for the pharmaceutical industry on BFPC method validation pathways.

Main Methods:

• The Modern Microbial Methods (M³ ) industry working group collaborated to develop recommendations.
• Focus on technology-specific primary and secondary validation strategies for BFPC.
• Consideration of validation parameters and acceptance criteria applicable to non-CFU reporting methods.

Main Results:

• The study outlines a method validation pathway tailored for BFPC technology.
• Specific recommendations are provided for primary and secondary validation stages.
• Discussion on adapting validation parameters for a technology that does not rely on colony formation.

Conclusions:

• BFPC technology presents a viable alternative for microbial monitoring in pharmaceutical settings.
• Standardized validation approaches are crucial for the successful implementation of BFPC.
• The recommendations aim to facilitate the adoption and regulatory acceptance of BFPC methods.