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A new quantitative PCR for human parvovirus B19 genotypes.

M Toppinen1, P Norja1, L-M Aaltonen2

  • 1University of Helsinki, Department of Virology, Haartmaninkatu 3, 00290 Helsinki, Finland.

Journal of Virological Methods
|March 22, 2015
PubMed
Summary

A new quantitative PCR (qPCR) assay effectively detects and quantifies all three genotypes of Parvovirus B19 (B19V). This sensitive assay aids in diagnosing B19V infections and monitoring viral persistence in various clinical samples.

Keywords:
B19VGenotypingParvovirusqPCR

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Area of Science:

  • Virology
  • Molecular Biology
  • Infectious Diseases

Background:

  • Parvovirus B19 (B19V) is a small ssDNA virus linked to diverse health issues, including erythema infectiosum and fetal mortality.
  • Lifelong persistence of B19V genomes in host tissues necessitates accurate viral quantification for clinical management.
  • Accurate B19V DNA quantification is crucial for determining primary infection timing, assessing tissue persistence, and screening blood donations.

Purpose of the Study:

  • To develop and validate a novel quantitative PCR (qPCR) assay for the detection, quantification, and differentiation of all three Parvovirus B19 genotypes.
  • To establish a sensitive and specific molecular tool for B19V analysis in various clinical specimens.

Main Methods:

  • A new B19V-specific qPCR assay was designed targeting a 154-bp region within the NS1 gene.
  • The assay was validated using the WHO International Reference Panel for Parvovirus B19 Genotypes.
  • Serum, plasma, and solid tissue samples were tested for B19V detection and quantification.

Main Results:

  • The developed qPCR assay demonstrated high specificity for B19V, detecting and quantifying all three genotypes.
  • The assay achieved high sensitivity, with detection limits of ≤10 copies/reaction.
  • Quantification results for panel members correlated well with established reference values from the NIBSC.
  • Sanger sequencing was employed to confirm the differentiation of B19V genotypes.

Conclusions:

  • The novel qPCR assay provides a reliable method for sensitive and specific detection, quantification, and genotyping of Parvovirus B19.
  • This assay is suitable for analyzing diverse clinical samples, including serum, plasma, and solid tissues.
  • The validated assay can be instrumental in clinical diagnostics, epidemiological studies, and blood screening for B19V.