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Related Experiment Videos

A new ozone-based method for virus inactivation: preliminary study

M M Kekez1, S A Sattar

  • 1National Research Council of Canada, Ottawa, Ontario, Canada.

Physics in Medicine and Biology
|December 12, 1997
PubMed
Summary

This study demonstrates a nebulization technique for rapid ozone inactivation of viruses in large volumes of body fluids. The method achieved over a 7-log10 reduction in MS2 bacteriophage viability.

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Area of Science:

  • Biotechnology
  • Virology
  • Ozone Therapy

Background:

  • Ozone is a potent disinfectant with potential for inactivating viruses in biological fluids.
  • Existing methods for ozone disinfection of bodily fluids can be time-consuming or inefficient for large volumes.

Purpose of the Study:

  • To develop and evaluate a nebulization technique for rapid and efficient inactivation of viruses in large volumes of body fluids using ozone.
  • To assess the efficacy of ozone nebulization against a model virus (MS2 bacteriophage) and compare it with existing thin-film methods.

Main Methods:

  • A nebulization technique was employed to expose viruses in body fluid simulants to ozone.
  • Coliphage MS2 was used as a model virus due to its safety and resistance to disinfection.
  • Ozone inactivation kinetics were analyzed, comparing nebulization (short exposure) with thin-film methods (long exposure).

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Main Results:

  • The nebulization technique demonstrated rapid inactivation of MS2 bacteriophage, achieving a >7-log10 reduction in viability.
  • Experimental data and theoretical curves for ozone inactivation of MS2 showed a semi-sigmoid relationship.
  • The study confirmed similar semi-sigmoid inactivation patterns for influenza A virus and vesicular stomatitis virus using thin-film methods.

Conclusions:

  • Nebulization offers a promising approach for rapid, large-volume viral inactivation in body fluids like plasma and blood using ozone.
  • The findings indicate potential for minimizing ozone concentrations required for effective viral disinfection.
  • The study highlights the efficiency of short-exposure nebulization compared to longer-exposure thin-film methods for ozone-based viral inactivation.