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Influenza SIRS with Minimal Pneumonitis
Shruti Erramilli1, Praveen Mannam1, Constantine A Manthous2
1Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, Yale University School of Medicine , New Haven, CT , USA.
Systemic inflammatory response syndrome (SIRS) can occur with influenza, even without significant lung damage. This case shows influenza viruses may trigger SIRS through vascular dysregulation, impacting organs beyond the lungs.
Area of Science:
- Infectious Diseases
- Critical Care Medicine
- Pathophysiology
Background:
- Systemic inflammatory response syndrome (SIRS) is a recognized complication of severe influenza pneumonia.
- However, SIRS is rarely reported in cases with minimal lung parenchymal disease.
Observation:
- A case presented with severe SIRS, anasarca (generalized edema), and significant vascular phenomena.
- The patient exhibited minimal to no signs of pneumonitis despite influenza infection.
Findings:
- Influenza virus infection can lead to severe SIRS and vascular dysregulation.
- These effects can manifest even with minimal or absent lung involvement (pneumonitis).
Implications:
- This case challenges the traditional understanding of SIRS pathogenesis in influenza.
- Highlights the potential for viral infections to cause systemic vascular dysfunction independent of substantial organ damage.
- Suggests a need to consider viral-induced vascular dysregulation in diagnosing SIRS, even with limited pulmonary findings.
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