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Severe acute respiratory infection — Clinical Guidelines

Overview

Severe acute respiratory infection (SARI) encompasses serious respiratory infections often requiring hospitalization, characterized by significant respiratory compromise and potential organ dysfunction. 4 5

Diagnosis

Clinical Presentation: Fever, hypothermia, or normothermia with evidence of organ dysfunction 4.

Laboratory Tests: Blood cultures, inflammatory markers (e.g., CRP, WBC count) 4 5.

Imaging: Chest X-ray or CT showing signs of pneumonia or other respiratory compromise 4.

Organ Dysfunction Criteria: Defined by clinical signs and laboratory abnormalities indicating systemic involvement 4 5.

Management

Antibiotics: Early administration crucial; choice based on culture sensitivity but consider broad-spectrum initially (e.g., piperacillin-tazobactam alternatives if resistant strains like A. pittii are suspected) 1 5.

Supportive Care: Mechanical ventilation, fluid management, and treatment of organ dysfunction 4.

Temperature Management: Specific temperature categories (hypothermia, normothermia, fever) may correlate with mortality; hypothermia noted to have higher mortality 4.

SIRS Monitoring: Presence of systemic inflammatory response syndrome (SIRS) evaluated; timing of antibiotic administration may vary 5.

Special Populations

Elderly: Higher vulnerability to severe outcomes; specific data not provided in abstracts 4.

Comorbidities: Presence of comorbidities likely impacts severity and mortality; detailed guidance not available in provided abstracts 4 5.

Key Recommendations

Early Antibiotic Administration: Initiate broad-spectrum antibiotics promptly upon suspicion of severe infection, adjusting based on culture results 5 (Evidence: Strong).

Monitor Temperature and Organ Dysfunction: Recognize the association between temperature status and mortality, closely monitor for signs of organ dysfunction 4 (Evidence: Moderate).

Evaluate for SIRS: Assess for systemic inflammatory response syndrome at admission to guide management and timing of interventions 5 (Evidence: Moderate).

References

1 Sun J, Xu W, Zhan X, Tian X, Yu Y. A rare case of community-acquired hypervirulent Acinetobacter Pittii infection, study of molecular characteristics, and literature review. Diagnostic microbiology and infectious disease 2025. link 2 Han HJ, Ouellette MC, Yeh JC, Dodge LE, Finlay E, Cullinan AM et al.. Outpatient Training During Hospice and Palliative Medicine Fellowship: A National Survey. Journal of pain and symptom management 2024. link 3 Miller SC, Intrator O, Scott W, Shreve ST, Phibbs CS, Kinosian B et al.. Increasing Veterans' Hospice Use: The Veterans Health Administration's Focus On Improving End-Of-Life Care. Health affairs (Project Hope) 2017. link 4 Henriksen DP, Havshøj U, Pedersen PB, Laursen CB, Jensen HK, Brabrand M et al.. Hospitalized acute patients with fever and severe infection have lower mortality than patients with hypo- or normothermia: a follow-up study. QJM : monthly journal of the Association of Physicians 2016. link 5 Henriksen DP, Laursen CB, Hallas J, Pedersen C, Lassen AT. Time to initial antibiotic administration, and short-term mortality among patients admitted with community-acquired severe infections with and without the presence of systemic inflammatory response syndrome: a follow-up study. Emergency medicine journal : EMJ 2015. link 6 Bergbom I, Svensson C, Berggren E, Kamsula M. Patients' and relatives' opinions and feelings about diaries kept by nurses in an intensive care unit: pilot study. Intensive & critical care nursing 1999. link80069-x)

Severe acute respiratory infection