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Yellow fever

Last reviewed: 26 Nov 2025
Last updated: 10 Aug 2023

Summary

Definition

History and exam

Key diagnostic factors

  • history of residence in, or recent travel to, endemic area
  • lack of yellow fever immunization
  • history of mosquito bite
  • fever
  • constitutional symptoms
  • conjunctival injection
  • relative bradycardia (Faget sign)
  • biphasic illness
  • hemorrhagic diathesis
  • signs of renal failure
  • signs of hepatic failure
  • jaundice
Full details

Other diagnostic factors

  • hypotension
  • abdominal pain, vomiting, and lethargy
Full details

Risk factors

  • residence in, or recent travel to, endemic area
  • lack of immunization
  • mosquito bite
  • travel during rainy and early dry seasons
Full details

Diagnostic tests

1st tests to order

  • CBC
  • liver function tests
  • coagulation screen
  • reverse transcription polymerase chain reaction (RT-PCR)
  • serology
Full details

Tests to consider

  • ECG
  • histopathology
Full details

Emerging tests

  • virus isolation
  • isothermal nucleic acid amplification assays

Treatment algorithm

INITIAL

unidentified viral hemorrhagic fever

ACUTE

confirmed yellow fever

Contributors

Authors

William A. Messer, MD, PhD

Associate Professor of Medicine

Department of Molecular Microbiology and Immunology

Division of Infectious Diseases

Oregon Health & Science University

Portland

OR

Declarações

WAM declares that he has no competing interests.

Agradecimentos

Dr William A. Messer would like to gratefully acknowledge Dr Philip A. Yeon and Dr Helmut Albrecht, previous contributors to this topic.

Disclosures

PAY and HA declares that he has no competing interests.

Revisores

Carlos Franco-Paredes, MD, MPH

Assistant Professor

Emory University

TravelWell Clinic

Emory University Hospital Midtown

Atlanta

GA

Divulgaciones

CFP declares that he has no competing interests.

Andrea K. Boggild, MSc, MD, DTMH, FRCPC

Clinical Assistant

Tropical Diseases Unit

Division of Infectious Diseases

Department of Medicine

Toronto General Hospital

University Health Network

Toronto

Canada

Divulgaciones

AKB declares that she has no competing interests.

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Referencias

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Artículos principales

World Health Organization. Yellow fever: fact sheet. May 2023 [internet publication].Texto completo

Staples JE, Bocchini JA Jr, Rubin L; Centers for Disease Control and Prevention (CDC). Yellow fever vaccine booster doses: recommendations of the Advisory Committee on Immunization Practices, 2015. MMWR Morb Mortal Wkly Rep. 2015;64:647-650.Texto completo  Resumen

Pan American Health Organization; World Health Organization. Laboratory diagnosis of yellow fever virus infection. September 2018 [internet publication].Texto completo

Artículos de referencia

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