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Related Experiment Videos

A simple method of drying virus on inanimate objects for virucidal testing.

L B Allen1, M J Kehoe, S C Hsu

  • 1Department of Microbiology and Immunology, Texas College of Osteopathic Medicine, Fort Worth.

Journal of Virological Methods
|March 1, 1988
PubMed
Summary

A new cold vacuum drying method preserves high virus titers on cover slips for weeks at -70°C. This technique simplifies disinfectant virucidal assays and cytotoxicity testing, offering a cost-effective approach for virology research.

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Area of Science:

  • Virology
  • Microbiology
  • Biotechnology

Background:

  • Accurate assessment of disinfectant efficacy against viruses is crucial for infection control.
  • Standard methods for virus titration can be labor-intensive and may lead to titer loss.

Purpose of the Study:

  • To describe a simple, effective method for drying viruses on inanimate objects for improved stability.
  • To establish a streamlined protocol for virucidal and cytotoxicity assays of disinfectants.

Main Methods:

  • Drying virus on cover slips using cold vacuum conditions.
  • Exposing virus-laden cover slips to disinfectants in specialized cuvettes.
  • Determining virus titers and disinfectant cytotoxicity through standard tissue culture methods.

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Main Results:

  • Virus maintained high titers (10^6-10^7) for 1-3 weeks at -70°C after drying.
  • The method allows for easy manipulation and titration of viruses on cover slips.
  • Disinfectant cytotoxicity assays were also simplified and economical.

Conclusions:

  • Cold vacuum drying is a simple and effective method for preserving virus infectivity on cover slips.
  • This technique facilitates reliable and economical virucidal and cytotoxicity assays for disinfectants.
  • The method is adaptable for various viruses and offers a practical solution for virology laboratories.