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Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria
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Clinical Features and Outcomes of Severe Pneumonia in Pediatric Human Metapneumovirus Infections

Kubra Aykac1, Zehra Tan Develi2, Berivan Onel2

  • 1Department of Pediatric Infectious Diseases, Hacettepe University Faculty of Medicine, Ankara, Türkiye.

Turkish Archives of Pediatrics
|April 27, 2026
PubMed
Abstract

Insights

Human metapneumovirus (hMPV) causes severe pneumonia in young children, often as a monoinfection. Increased hospitalizations in 2024 highlight the need for better surveillance and diagnostics for this respiratory virus.

Area of Science:

  • Pediatric Infectious Diseases
  • Respiratory Virology
  • Clinical Epidemiology

Background:

  • Human metapneumovirus (hMPV) is a significant cause of pediatric respiratory infections globally.
  • Epidemiological data and clinical impact of hMPV are not fully understood.
  • Severe outcomes, including pneumonia, necessitate further investigation.

Purpose of the Study:

  • To evaluate clinical features and outcomes of severe pneumonia in hospitalized children with hMPV infection.
  • To identify factors associated with severe pneumonia in pediatric hMPV cases.
  • To analyze trends in hMPV-related hospitalizations and disease severity.

Main Methods:

  • Retrospective analysis of pediatric patients diagnosed with hMPV infection.
  • Data collected from January 2018 to December 2024 at a single children's hospital.
  • Systematic review of demographic, clinical, and laboratory data.

Main Results:

  • 17.2% of 116 children developed severe pneumonia; 85% were under 5 years old.
  • Severe pneumonia was predominantly hMPV monoinfection (90%), while non-severe cases often had coinfections (e.g., rhinovirus).
  • Hospitalizations increased significantly in 2024 (36%), with one infection-related mortality.

Conclusions:

  • Severe pneumonia in this cohort was primarily linked to hMPV monoinfection.
  • Rising hospitalizations in 2024 suggest evolving disease patterns.
  • Findings emphasize the need for enhanced hMPV surveillance, diagnostics, and preventive strategies.
Keywords:
Childcoinfectionepidemiologyhuman metapneumovirusviral pneumonia

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