Low-Grade Persistent Poliovirus Infection Discovered in Post-Polio Syndrome Patients

Strategic Insights -

Current study results have identified a link between post-polio syndrome (PPS) and low-grade persistent poliovirus infection in patients with the condition. Researchers from the University of Insubria in Northern Italy investigated 251 participants, including long-term polio survivors with PPS, stable polio survivors, family members, and healthy controls. The study found that 87.2% of PPS cases had poliovirus genomes and proteins detected, compared to 12.0% of stable polio cases and 3.5% of control family members.

Key Takeaways:

  • The study found that 87.2% of PPS cases had poliovirus genomes and proteins detected in peripheral blood leukocytes and cerebrospinal fluid (CSF).
  • The detection rate in family members was very low, indicating minimal transmissibility of the virus variants.
  • Molecular analysis of the detected PV strains revealed mutations across most genome regions, which may lead to defects in virus replication.
  • In cell cultures, PPS-derived PV strains induced the release of inflammatory mediators (IL6, IL8, MCP1), which may play a pathogenic role in PPS.
  • The study suggests that the presence of mutated PV forms in blood leukocytes and CSF could serve as a diagnostic marker for PPS.
  • The research concludes that antiviral treatments might help reduce PPS progression.

Statistics:

  • 251 participants were investigated in the study.
  • 87.2% of PPS cases had poliovirus genomes and proteins detected.
  • 12.0% of stable polio cases had poliovirus genomes and proteins detected.
  • 3.5% of control family members had poliovirus genomes and proteins detected.
  • 92% of PPS patients had mutated PV strains detected in peripheral blood and CSF.

Sources:

  • Low-grade persistent poliovirus infection in long-term polio survivors diagnosed with post-polio syndrome: diagnostic and clinical implications. Journal of Neurology, 2025;272(9):617.
  • University of Insubria
  • Springer Heidelberg
  • Global Virus Network
  • Antonio Toniolo, Angelo Genoni, Giuseppe Maccari, Konstantin Chumakov, Fulvio Basolo, Giorgio Bono, Marco Mauri, Franco Molteni, Luisa Arrondini, Laura Bertolasi, and Salvatore Monaco.