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Related Experiment Videos

Does this patient have influenza?

Stephanie A Call1, Mark A Vollenweider, Carlton A Hornung

  • 1Department of Medicine, University of Louisville, Louisville, Ky 40202, USA.

JAMA
|February 25, 2005
PubMed
Summary
This summary is machine-generated.

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Clinical symptoms alone are not reliable for diagnosing influenza. Rapid diagnostic tests and community-wide influenza activity data are crucial for accurate patient management, especially during high demand for antiviral agents.

Area of Science:

  • Infectious Diseases
  • Clinical Diagnostics
  • Epidemiology

Background:

  • Influenza vaccination reduces but does not eliminate influenza risk.
  • Accurate and rapid clinical diagnosis of influenza is essential for patient management, particularly during antiviral shortages.

Purpose of the Study:

  • To systematically review the diagnostic accuracy of influenza symptoms and signs.
  • To evaluate the performance of rapid influenza diagnostic tests.

Main Methods:

  • Systematic literature search of MEDLINE and bibliographies (1966-2004).
  • Inclusion of studies reporting operating characteristics of symptoms/signs against a criterion standard.
  • Data abstraction and likelihood ratio (LR) estimation by two independent reviewers.

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Main Results:

  • No single symptom or sign reliably confirmed or excluded influenza in the general population.
  • Absence of fever, cough, or nasal congestion decreased influenza likelihood (LR < 0.5).
  • In older adults (≥60 years), combinations of fever, cough, acute onset, malaise, and chills increased influenza likelihood (LR > 2.0).

Conclusions:

  • Clinical findings alone are insufficient for definitive influenza diagnosis.
  • Clinicians should consider community influenza activity and utilize rapid diagnostic tests for informed management decisions.