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Isolation and Quantification of Zika Virus from Multiple Organs in a Mouse
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VZV molecular epidemiology.

Judith Breuer1

  • 1University College London, W1 2BE, Bloomsbury, London. j.breuer@ucl.ac.uk

Current Topics in Microbiology and Immunology
|March 16, 2010
PubMed
Summary
This summary is machine-generated.

Molecular epidemiology of varicella zoster virus (VZV) reveals its evolution and spread. Genotyping confirms VZV causing chickenpox is the same as that causing shingles, and reinfection is possible.

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Area of Science:

  • Virology
  • Molecular Epidemiology
  • Genetics

Background:

  • Varicella zoster virus (VZV) molecular epidemiology aids understanding of virus evolution, spread, and pathogenesis.
  • Over 20 full-length VZV genomes confirm at least five distinct virus clades.
  • Genomic data provide estimates of VZV evolutionary rates and evidence of past and ongoing recombination.

Purpose of the Study:

  • To elucidate the evolutionary dynamics and transmission patterns of VZV.
  • To confirm the genetic identity of VZV strains causing primary varicella and secondary zoster reactivation.
  • To investigate the occurrence and implications of VZV reinfection.

Main Methods:

  • Whole-genome sequencing of VZV isolates.
  • Genotyping using restriction enzyme analysis (REA) and single nucleotide polymorphisms (SNP).
  • Epidemiological data analysis and mathematical modeling of transmission.

Main Results:

  • Confirmation of at least five VZV clades and estimation of evolutionary rates.
  • Genotyping demonstrated that VZV causing varicella is identical to the virus reactivating as zoster.
  • Evidence supporting asymptomatic VZV reinfection, with the potential for secondary latency and reactivation.
  • Identification of VZV as the only human herpesvirus transmitted via the respiratory route.

Conclusions:

  • Molecular epidemiology and genotyping provide critical insights into VZV evolution, pathogenesis, and transmission.
  • VZV strains causing varicella and zoster are genetically identical, with reinfection being a documented phenomenon.
  • Understanding VZV transmission dynamics is crucial for public health strategies against chickenpox and shingles.