Goal
Eradicate infectious prions from water, medical instruments and waste streams
Problem
Prion contamination in food-processing waste, surgical instruments and the environment, which can transmit diseases such as mad cow disease and Creutzfeldt-Jakob disease
Concept Summary
Water that has been saturated with molecular ozone is capable of inactivating prion proteins. The ozone reacts oxidatively with the misfolded proteins, destroying their infectivity. The process can be applied as a simple ozone bath for instruments or for treating contaminated wastewater.
Detailed Description
The University of Alberta team demonstrated that exposing prion-contaminated water to ozone results in rapid loss of prion infectivity, achieving up to 99.99 % reduction. The method builds on existing ozone disinfection technology used in food-processing and hospitals. After ozone treatment, the water (or instrument) is safe for disposal or reuse. Full validation requires animal infection studies to confirm complete inactivation.
Principles
- Oxidative damage by molecular ozone
- Disinfection through reactive oxygen species
- Protein denaturation
Scientific Domains
Materials
- Water
- Ozone (O_3) gas
Mechanisms of Action
- Ozone reacts with prion protein residues, breaking peptide bonds
- Generation of reactive oxygen species that modify protein folding
- Loss of prion infectivity after oxidative modification
Applications
- Sterilization of surgical and dental instruments
- Decontamination of slaughterhouse wastewater
- Environmental cleanup of prion-contaminated sites
Claimed Performance
Up to 99.99 % destruction of prions in a short ozone bath exposure
Experimental Evidence
The researchers demonstrated for the first time that prions are highly susceptible to molecular ozone, achieving rapid loss of infectivity in treated water; they note that the only definitive proof of full inactivation would be animal infection studies.
Limitations
- Full validation requires animal infection studies
- Ozone penetration depth may be limited for solid surfaces
- Potential ozone toxicity if not properly vented
