Clinical Features and Gene Expression Patterns in Adults Hospitalized With Respiratory Syncytial Virus and Human Metapneumovirus Infection - Scorecard - MDSpire
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Clinical Features and Gene Expression Patterns in Adults Hospitalized With Respiratory Syncytial Virus and Human Metapneumovirus Infection
Clinical Scorecard: Clinical Characteristics and Gene Expression Profiles in Adults Admitted for Respiratory Syncytial Virus and Human Metapneumovirus Infections
At a Glance
Category
Detail
Condition
Acute respiratory infections caused by Respiratory Syncytial Virus (RSV) and Human Metapneumovirus (HMPV)
Key Mechanisms
RSV and HMPV are related Pneumoviridae family viruses; HMPV lacks two RSV nonstructural proteins that suppress type I interferon signaling; distinct gene expression profiles observed in infected adults
Target Population
Hospitalized adults aged 18 years and older with acute respiratory illness
Care Setting
Hospital inpatient settings, including general hospitals and medical centers
Key Highlights
RSV accounts for significant adult morbidity and mortality with 60,000–180,000 hospitalizations and 10,000–14,000 deaths annually in the US; HMPV also causes notable morbidity but is less well characterized.
Adults with HMPV infection present more frequently with sore throat, fever >38°C, and clinically adjudicated viral pneumonia compared to RSV-infected adults.
Gene expression analysis revealed 197 differentially expressed genes between RSV and HMPV infections; HMPV associated with genes linked to antigen binding and adaptive immunity, RSV with NK T cell-related genes.
Guideline-Based Recommendations
Diagnosis
Use RT-PCR and/or a 4-fold rise in serum IgG titers to confirm RSV or HMPV infection.
Collect nasal swabs and sputum samples for viral and bacterial pathogen testing.
Exclude bacterial coinfection to accurately attribute clinical features to viral infection.
Management
Hospitalize adults with acute respiratory illness and confirmed RSV or HMPV infection for supportive care.
Consider clinical features such as fever, sore throat, and pneumonia in management decisions.
Monitor for bacterial coinfections and treat accordingly.
Monitoring & Follow-up
Monitor clinical signs including temperature and respiratory symptoms.
Use blood tests including procalcitonin to assess for bacterial coinfection.
Observe gene expression profiles in research settings to understand host response differences.
Risks
RSV and HMPV infections can lead to severe respiratory illness and pneumonia in adults.
Underlying heart and lung disease may influence disease severity, though HMPV patients had less tobacco use and fewer comorbidities in this study.
Potential for misdiagnosis if bacterial coinfections are not excluded.
Patient & Prescribing Data
Hospitalized adults with acute respiratory infections caused by RSV or HMPV
No specific antiviral treatments detailed; management is supportive; vaccination against RSV is available for older adults, and HMPV vaccines are in development.
Clinical Best Practices
Screen hospitalized adults with acute respiratory symptoms for RSV and HMPV using molecular diagnostics.
Exclude bacterial coinfections to guide appropriate antimicrobial use.
Recognize that HMPV infection may present with more flu-like symptoms and viral pneumonia compared to RSV.
Incorporate gene expression profiling in research to inform vaccine and therapeutic development.
by Colin Samoriski, Chin-Yi Chu, Ann R Falsey, Derick Peterson, Soumyaroop Bhattacharya, Daniel P Croft, Angela R Branche, Michael Peasley, Andrea Baran, Anthony Corbett, John Ashton, Thomas J Mariani, Edward E Walsh
Large Swedish cohort study finds children hospitalized for respiratory syncytial virus at older ages have greater risk of subsequent bacterial pneumonia
