Development of a Procedure for Prion Surveillance in the Laboratory Setting

Area of Science:

• Prion biology and disease
• Biosafety and laboratory security
• Analytical chemistry and detection methods

Background:

• Infectious prions adhere to surfaces, resist decontamination, and pose significant biosafety risks in medical and research settings.
• Occupational exposures highlight the urgent need for improved prion detection and safety measures.

Purpose of the Study:

• To develop and validate a sensitive method for detecting prions on contaminated surfaces.
• To assess the effectiveness of current prion decontamination procedures.
• To enhance prion surveillance in research and clinical environments.

Main Methods:

• Combination of foam-swab surface sampling with Protein Misfolding Cyclic Amplification (PMCA).
• Detection of human-health-relevant prions from surfaces at high dilutions.
• Application of the method for evaluating decontamination completeness and active surveillance.

Main Results:

• Successfully detected prions directly from contaminated surfaces, even at 100 million-fold dilutions.
• Demonstrated that significant prion quantities can resist approved inactivation methods.
• Validated the method in real-world scenarios, including facility decommissioning and operational laboratory surveillance.

Conclusions:

• The developed methodology provides a robust and efficient tool for detecting residual prion contamination.
• This approach significantly enhances laboratory safety by improving prion surveillance capabilities.
• Highlights limitations of current decontamination methods and the need for advanced detection techniques.