Clinical characteristics and illness course based on pathogen among children with respiratory illness presenting to...

Area of Science:

• Pediatric Emergency Medicine
• Infectious Diseases
• Clinical Virology

Background:

• Upper respiratory illnesses are a leading cause of pediatric emergency department visits.
• Identifying specific pathogens is crucial for understanding disease severity and outcomes.

Purpose of the Study:

• To analyze clinical characteristics, hospitalization risk, and symptom duration in children with acute respiratory illness.
• To compare outcomes associated with different respiratory pathogens and coinfections.

Main Methods:

• Retrospective analysis of a randomized controlled trial involving 931 children (1 month to 18 years).
• Utilized multivariable Poisson regression for hospitalization risk and Cox proportional hazards models for symptom duration.
• Assessed outcomes based on identified respiratory pathogens using a rapid molecular pathogen panel.

Main Results:

• Respiratory syncytial virus (RSV), human metapneumovirus (hMPV), and human rhinovirus/enterovirus (HRV/EV) were associated with higher hospitalization risk than influenza.
• RSV, parainfluenza, and atypical bacterial pathogens showed longer illness durations compared to influenza.
• RSV, hMPV, and atypical bacterial pathogens indicated increased illness severity and duration; coinfections did not elevate severity.

Conclusions:

• RSV, hMPV, and atypical bacterial pathogens represent significant contributors to pediatric respiratory illness severity and duration.
• Influenza serves as a benchmark for comparison, with other viruses and bacteria demonstrating worse outcomes.
• Targeted diagnostics and management strategies for specific pathogens are essential in pediatric respiratory care.