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Community-Acquired Pneumonia in Children: Myths and Facts
Ki Wook Yun1,2, Rebecca Wallihan3, Alexis Juergensen1
1Center for Vaccines and Immunity, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio.
Insights
Community-acquired pneumonia (CAP) in children is a major global health threat. New diagnostic tools analyzing host immune responses, alongside pathogen detection, are crucial for better management and improved outcomes.
Area of Science:
- Pediatrics
- Infectious Diseases
- Immunology
Background:
- Community-acquired pneumonia (CAP) is a leading cause of mortality in children globally.
- CAP necessitates significant antibiotic use and hospitalizations, even in developed nations.
- Optimal CAP management in children remains undefined, with complex viral and bacterial interactions.
Purpose of the Study:
- To highlight the need for advanced technologies to differentiate viral, bacterial, and coinfections in pediatric CAP.
- To explore the potential of host immune transcriptome profiles for diagnosing CAP, assessing severity, and predicting prognosis.
- To advocate for an optimized management strategy integrating molecular diagnostics and transcriptome profiling.
Main Methods:
- Review of current understanding of viral and bacterial interactions in pediatric CAP.
- Discussion of the limitations of pathogen-focused diagnostics.
- Proposal of host immune transcriptome profiling as a novel diagnostic approach.
Main Results:
- Respiratory viruses are common causes of CAP, but coinfections with bacteria can enhance disease severity.
- Host immune transcriptome profiles may offer unique diagnostic signatures for CAP.
- Transcriptome analysis could aid in assessing disease severity and prognosis.
Conclusions:
- Advanced technologies are needed to accurately identify causative agents in pediatric CAP, including coinfections.
- Host immune transcriptome profiling presents a promising avenue for improved diagnostics and management of pediatric CAP.
- Integrating molecular pathogen testing with transcriptome analysis can lead to targeted therapies and better clinical outcomes.
Abstract:
Community-acquired pneumonia (CAP) is the leading cause of death in children < 5 years of age worldwide. It is also one of the most frequent infectious diseases in children, leading to large antibiotic use and hospitalization even in the industrialized countries. However, the optimal management of CAP in children is still not well defined. Currently, respiratory viruses are considered the most frequent etiologic agents, but detection of viruses in the upper respiratory tract does not guarantee causation of pneumonia, nor precludes the presence of a bacterial pathogen. In both the upper and lower respiratory tract, respiratory viruses and pathogenic bacteria interact. Emerging evidence indicates that dual viral-bacterial infections function synergistically in many cases and together likely enhance the severity of CAP. Therefore, new and advanced technologies capable of sensitively and specifically discriminating viral, bacterial, and viral-bacterial coinfections are needed. Instead of focusing on the pathogen, analysis of host immune transcriptome profiles from children with CAP can potentially offer diagnostic signatures, help to assess disease severity, and eventually, prognostic indicators. An optimized management strategy by using molecular pathogen testing and transcriptome profiling will facilitate prompt, more appropriate, and targeted therapies, which in turn will lead to improved clinical outcomes in children with CAP.
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