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[West Nile fever].

Tomohiko Takasaki1

  • 1Vector-Borne Virus Laboratory, Department of Virology 1st, National Institute of Infectious Diseases.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|December 21, 2005
PubMed
Summary
This summary is machine-generated.

West Nile virus (WNV) emerged in North America in 1999, causing encephalitis. This Flaviviridae family virus is transmitted by mosquitoes and can spread through blood transfusions.

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Area of Science:

  • Virology
  • Epidemiology
  • Public Health

Context:

  • West Nile virus (WNV) detection in North America in 1999 marked its emergence.
  • Initial encephalitis cases in New York were misdiagnosed as Saint Louis encephalitis.
  • Unusual bird mortality (crows, flamingos) preceded WNV identification.

Purpose:

  • To identify the causative agent of unexplained encephalitis in New York.
  • To understand the emergence and spread of West Nile virus in North America.
  • To inform public health strategies for WNV prevention.

Summary:

  • Viral isolation and genomic sequencing identified West Nile virus as the cause of encephalitis.
  • WNV, a Flaviviridae member, causes fever, meningitis, and encephalitis.

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  • The virus remained active in North America from 1999 to 2005, with transmission routes including blood transfusion.

    • Impact:

    • Established WNV as a significant public health concern in North America.
    • Highlighted the importance of vector surveillance and accurate diagnosis.
    • Informed Centers for Disease Control and Prevention (CDC) guidance for community protection.