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

Program Reports: 

Archive of Previous Years WNV Surveillance Reports: 2021  2020  2019  2018  2017  2016  2013  2012  2011  2010  2009  2008  2007      2006  2005 2004 2003 2002


Dead Bird Reporting

     Safe Handling Guidelines for Dead Birds







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. Contact the arbovirus coordinator for details.


Primary Contact Information

Louisiana Arboviral Coordinator: Sean Simonson, MPH
1450 Poydras Street, Ste. 1641
New Orleans, LA 70112
Telephone: (504) 568-8313
 Fax: (504) 568-8290
 Email: sean.simonson@la.gov