Saint Louis Encephalitis
Saint (St.) Louis Encephalitis virus (SLEV) is spread to people through the bite of infected mosquitoes. This virus is found in mosquitoes from Canada to Argentina although most human cases of disease have occurred in the United States. No cases have been reported from Connecticut. There is no vaccine to prevent or medicine to treat SLEV virus infection. The best way to prevent getting sick from SLEV is to prevent mosquito bites.
Where in the United States Has SLEV Been Found?
Information for Clinicians
National Surveillance Case Definitions
Connecticut Provider Reporting Information
Connecticut Laboratory Reporting Information
SLEV testing at the State Public Health Laboratory
State Public Health Laboratory Contacts – for additional information
Connecticut St. Louis Encephalitis Surveillance
In 2000, encephalitis was added to the state-wide reportable disease list, which included Saint Louis encephalitis (SLE). There have been no reported cases of SLE to the Connecticut Department of Public Health.
Connecticut Annual Infectious Diseases Statistics
Additional Resources
Connecticut Mosquito Management Program
Workplace Safety - Mosquito-Borne Diseases NIOSH
This page last updated 11/4/2022.