Western Equine Encephalitis outbreak in Argentina


  • Last year, the International Health Regulations National Focal Point (IHR NFP) in Argentina alerted the Pan American Health Organization/World Health Organization (PAHO/WHO) of a human case of Western Equine Encephalitis Virus (WEEV) infection.
  • Since then the outbreak has since grown to 21 confirmed new cases of the infection in Argentina.
  • The last cases of human infections in Argentina were reported in 1982, 1983, and an isolated event in 1996.

About Western Equine Encephalitis:

  • Western Equine Encephalitis is a mosquito­borne infection which is caused by the WEEV and it belongs to the Togaviridae family of viruses.
  • The virus has nearly 11.5 kilobases long single­stranded RNA genome.
  • The virus is a recombinant of the eastern equine encephalitis virus and a Sindbislike virus.
  • Passerine birds are thought to be the reservoir and equine species are intermediate hosts.
  • The primary mode of transmission of the infection to humans is through mosquitoes which act as vectors for the virus transmission.
  • While most of the infections are asymptomatic, the infection may lead to severe consequences in the rare cases.

The post Western Equine Encephalitis outbreak in Argentina appeared first on Vajirao IAS.


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