About: Standard methods of virus diagnosis may take many days to complete. As antiviral drugs are being used with more effectiveness, it becomes more important to develop rapid diagnostic methods. It takes only a few minutes to prepare and examine a specimen for electron microscopy (EM), using the negative staining technique. Viruses in the specimen can readily be identified by their morphology. In order to be detected by EM there must be at least 10(7) virus particles per milliliter of sample. This concentration is frequently found in certain types of specimens. The sensitivity of EM is increased 100-fold if homologous antibody is used to aggregate the virus. Visualization of virus-antibody aggregates forms the basis for serotyping by immunoelectron microscopy (IEM).   Goto Sponge  NotDistinct  Permalink

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  • Standard methods of virus diagnosis may take many days to complete. As antiviral drugs are being used with more effectiveness, it becomes more important to develop rapid diagnostic methods. It takes only a few minutes to prepare and examine a specimen for electron microscopy (EM), using the negative staining technique. Viruses in the specimen can readily be identified by their morphology. In order to be detected by EM there must be at least 10(7) virus particles per milliliter of sample. This concentration is frequently found in certain types of specimens. The sensitivity of EM is increased 100-fold if homologous antibody is used to aggregate the virus. Visualization of virus-antibody aggregates forms the basis for serotyping by immunoelectron microscopy (IEM).
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  • Virology
  • Pathology
  • Electron microscopy
  • Viruses
  • Scientific techniques
  • Accelerator physics
  • Anatomical pathology
  • Cooking weights and measures
  • Electron microscopy stains
  • German inventions
  • Microscopes
  • Protein imaging
  • 1898 in biology
  • 20th-century inventions
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