Related Experiment Video
Updated: Apr 28, 2026
09:01
An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection
Published on: December 10, 2013
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A Blood-Based Interferon Viral Score Defines Acute RSV Bronchiolitis in Infants
Ilaria Galliano1,2, Stefania Alfonsina Liguori3, Anna Pau1
1Department of Public Health and Pediatric Sciences, University of Turin, 10100 Turin, Italy.
Infectious Disease Reports
|April 27, 2026
Summary
A new Viral Score, based on interferon-stimulated genes, effectively tracks respiratory syncytial virus (RSV) infection in infants. This score indicates active infection and declines as the illness resolves, aiding in disease monitoring.
Area of Science:
- Pediatric infectious diseases
- Immunology
- Virology
Background:
- Respiratory syncytial virus (RSV) is a primary cause of infant bronchiolitis and hospitalization.
- Current diagnostic methods lack reliable biomarkers for host antiviral responses in RSV infections.
Purpose of the Study:
- To evaluate interferon-stimulated genes (ISGs) as biomarkers for RSV bronchiolitis.
- To develop a composite score reflecting systemic antiviral immunity.
Main Methods:
- Multiplex RT-qPCR was used to measure IFI44L, IFI27, and RSAD2 expression in infants with RSV and healthy controls.
- A Viral Score was calculated based on the coordinated expression of these ISGs.
Main Results:
- ISGs and the Viral Score were significantly elevated in infants with acute RSV infection compared to those recovering or healthy.
- The Viral Score demonstrated a clear distinction between acute infection, recovery, and healthy states.
- Expression levels declined significantly upon clinical recovery, indicating dynamic interferon activation.
Conclusions:
- The interferon-based Viral Score accurately reflects systemic antiviral responses in infants with RSV bronchiolitis.
- This score serves as a promising biomarker for identifying viral infection status and monitoring disease progression in pediatric respiratory illnesses.
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