Houston Health Department

WEST NILE UPDATES


West Nile MosquitoWest Nile Virus (WNV) is a mosquito-borne virus that can cause encephalitis (inflammation of the brain) or Meningitis (inflammation of the lining of the brain and spinal cord). It was first isolated in an adult woman in the West Nile Valley of Uganda in 1937. WNV caused an outbreak in elderly patients in Israel in 1957 and equine disease in Egypt and France in the early 1960s.The virus first appeared in North America in 1999, causing human death in New York City.

In July of 2000, the Centers for Disease Control and Prevention awarded a grant to the Houston Department of Health and Human Services under the umbrella of "Epidemiology and Laboratory Capacity (ELC) for Infectious Diseases" to conduct sero-surveillance of WNV in Houston. The Houston Health Deptartment Bureau of Epidemiology, Harris County Public Health and Environmental Services are collaborative partners in an initiative to expand WNV surveillance activities to non-Houston areas of Harris County. West Nile encephalitis could occur year round in southern climates, while in the north, the cases occur primarily in late summer or early fall.

    
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  • Cases Reported Last Updated on: Wednesday, August 15, 2018

    1
     Gender 
     Age Range 
      Date Reported  
       Area   
      Case Number   
     Male  
    45-54
    07/16/2018
      Northwest Houston  
    2
     Male  
    45-54
    03/06/2018
      Northwest Houston  
    1

     Gender 
     Age Range 
      Date Reported  
       Area   
      Case Number   
     Male  
    45-54
    09/13/2017
      Northeast Houston  
    4
     Male  
    85-94
    09/09/2017
      Southwest Houston  
    3
     Male  
    45-54
    08/03/2017
      Northwest Houston  
    2
     Female  
    5-14
    08/11/2017
      Southwest Houston  
    1


    Cases Reported Last Updated on: Wednesday, August 19, 2016

     Gender 
     Age Range 
      Date Reported  
       Area   
      Case Number   
     Female  
    55-74
    08/02/2016
      NorthWest  
    1
     Male 
    75-84
    08/02/2016
    NorthEast Houston
    2