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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Mosquito Prevention Tips


 Gender 
 Age Range 
  Date Reported  
   Area   
  Case Number   
Male
45-54
09/25/2018
  Southwest Houston  
4
Male
35-44
09/25/2018
Southeast Houston
3
Female
45-54
09/05/2018
Southeast Houston
2
Male
45-54
7/16/2018
Northeast Houston
1

 Gender 
 Age Range 
  Date Reported  
   Area   
  Case Number   
 Male  
45-54
03/06/2017
  Northwest Houston  
5
 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

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