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A third genotype of the human parvovirus PARV4 in sub-Saharan Africa

Peter Simmonds1, Jill Douglas1, Giovanna Bestetti2

  • 1Centre for Infectious Diseases, University of Edinburgh, Summerhall, Edinburgh EH9 1QH, UK.

The Journal of General Virology
|August 30, 2008
PubMed

Insights

Human Parvovirus 4 (PARV4) is prevalent in HIV-co-infected individuals. A new PARV4 genotype was identified in African AIDS patients, distinct from previous strains, expanding our understanding of PARV4 diversity.

Area of Science:

  • Virology
  • Infectious Diseases
  • Genomics

Background:

  • Human Parvovirus 4 (PARV4) is a recently identified virus.
  • It is prevalent in injecting drug users, especially those co-infected with human immunodeficiency virus (HIV).
  • PARV4, similar to parvovirus B19, establishes persistent infections.

Purpose of the Study:

  • To investigate the genetic diversity of PARV4.
  • To identify novel PARV4 genotypes and their characteristics.
  • To explore the phylogenetic relationship of PARV4 strains.

Main Methods:

  • Detection of PARV4 sequences in bone marrow and lymphoid tissues.
  • Phylogenetic analysis of PARV4 variants.
  • Near-complete genome sequencing of novel PARV4 strains.

Main Results:

  • PARV4 sequences were found in two sub-Saharan African AIDS patients without a history of parenteral exposure and hepatitis C virus (HCV) infection.
  • These PARV4 variants represented a novel, third genotype, phylogenetically distinct from previously known genotypes 1 and 2 (formerly PARV5).
  • Analysis revealed conserved novel open reading frames within the ORF2 coding sequence, including one encoding a putative protein homologous to Parvovirus genus SAT proteins.

Conclusions:

  • A novel genotype of Human Parvovirus 4 (PARV4) has been identified.
  • This discovery expands the known genetic diversity of PARV4.
  • The findings suggest potential broader transmission routes and unique genetic features of this human parvovirus.

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