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Immunogold Electron Microscopy01:20

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Isolation and Genome Analysis of Single Virions using 'Single Virus Genomics'
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Concentration of viruses and electron microscopy.

I D Petrova1, B N Zaitsev1, O S Taranov1

  • 1State Research Center of Virology and Biotechnology "Vector", Rospotrebnadzor, Koltsovo, Novosibirsk region, Russia.

Vavilovskii Zhurnal Genetiki I Selektsii
|March 4, 2021
PubMed
Summary

Electron microscopy (EM) is crucial for studying emerging viruses, but requires concentrating samples. This review details various virus concentration techniques, highlighting that the best method depends on study goals and lab resources.

Keywords:
electron microscopyreviewvirus concentrationvirus detectionvirus purification

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Area of Science:

  • Virology and Nanobiotechnology
  • Microscopy and Diagnostics

Background:

  • Emerging viruses cause most lethal outbreaks; electron microscopy (EM) offers high-resolution structural data for virology and nanobiotechnology.
  • EM is vital for environmental virus detection, vaccine production analysis, and diagnostics, despite limitations like a high detection limit (107 particles/mL).
  • Effective virus concentration is essential for EM analysis due to its high detection limit.

Purpose of the Study:

  • To review and describe various virus concentration techniques.
  • To provide examples of concentration methods for different viruses.
  • To guide the selection of appropriate concentration methods based on study objectives and laboratory capabilities.

Main Methods:

  • Review of existing studies on virus concentration techniques.
  • Description of methods including precipitation, centrifugation, filtration, and chromatography.
  • Discussion of novel concentration approaches such as unique traps, magnetic beads, and nanomaterials.

Main Results:

  • No single universal method is most effective for concentrating all viruses.
  • Modern protocols combine precipitation, centrifugation, filtration, and chromatography.
  • Novel techniques involving magnetic beads, nanomaterials, and centrifugal concentrators show promise for improved viral recovery.

Conclusions:

  • Effective elution is critical for maximizing viral recovery after concentration.
  • The choice of virus concentration method should be tailored to specific research goals and available laboratory equipment.
  • Continued research into advanced concentration techniques is necessary to overcome EM's detection limit challenges.