West Nile Virus

Highlighted Facts

  • Surveillance for WNV was initiated in Louisiana in the Spring 2000 and currently involves the testing of dead birds, live birds, sick horses, mosquito pools and sentinel chicken flocks.  With the exception of horse testing, WNV testing is performed at the request of individual mosquito abatement districts throughout the state. WNV is considered endemic or native to all parts of Louisiana, thus statewide dead bird reporting has been suspended. Dead bird testing is now understood to be a poor predictor of human cases and its value is limited unless part of a more comprehensive mosquito surveillance program, as is conducted by local or parish mosquito abatement districts.          
  • Louisiana has four kinds of Encephalitis: West Nile Fever, Saint Louis, Eastern Equine and California Encephalitis.
  • Click here for West Nile Virus FAQs

Recent News and Issues and Program Reports:

     Dead Bird Reporting

     Safe Handling Guidelines for Dead Birds

     West Nile Virus Weekly Reports: 2020 

     Previous Year-End WNV Weekly Surveillance Reports: 2019   2018   2017  2016   2013  2012   2011   2010   2009   2008    2007    2006  

 2005    2004   2003    2002

     Arthropod-Borne Encephalitis in Louisiana - Annual Report

     WNV Annual Report - Louisiana

     West Nile Story 

     Repellent and Pesticides
          How Do I Choose a Repellant - Poster - CDC

 Health Education Materials: 
         The Infectious Disease Section offers limited quantities of  free West Nile virus and other mosquito borne disease educational materials.              Please contact the arbovirus coordinator for further information and availabilities.


Primary Contact Information

Louisiana Arboviral Coordinator: Sean Simonson, MPH
1450 Poydras Street, Ste. 1641
New Orleans, LA 70112
Telephone: (504) 568-8342
 Fax: (504) 568-8290
 Email: sean.simonson@la.gov