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St. Louis Encephalitis

St. Louis encephalitis (SLE) is a virus that is spread to humans through the bite of an infected* mosquito.

Overview

How can I get sick?

  • Being bit by a mosquito that has the virus.

Symptoms in humans:

Most people who get the virus, do not become sick, but other people might get the following symptoms:

  • Fever (when your body gets a little hotter than normal)

  • Headache
  • Feeling like you need to throw up
  • Dizziness
  • Serious symptoms:
    • Encephalitis (infection of the brain)

 

What can I do to stay healthy?

Protect yourself and your family from mosquito bitesĀ 

  • Use insect repellents* while hiking, camping, hunting, or being outside. Ask an adult to help you with insect repellent*.

  • Wear long pants, long sleeves, and long socks when outside.
  • Treat your clothes, gear (boots, tents, backpacks or camping gear), or any outdoor equipment with insect repellent*.
  • Use screens on windows and doors to keep mosquitos outside.
  • Remove anything that will bring mosquitoes into your home. For example, emptying standing water from pots, buckets, barrels, and other containers.

What to do when traveling overseas

  • Use insect repellents* while hiking, camping, hunting, or being outside. Ask an adult to help you with insect repellent.
  • Wear long pants, long sleeves, and long socks when outside.
  • Treat your clothes, gear (boots, tents, backpacks or camping gear), or any outdoor equipment with insect repellent*.
  • Choose a hotel or place to stay that has air conditioning or windows and doors with screens to keep mosquitos outside.
  • Use mosquito nets when sleeping outside or if you are staying in a room with no screens on windows or doors.

*Definitions:

  • Insect Repellent: Product applied to skin, clothing or surfaces to keep insects away.

Species Affected

Learn About Other Diseases

Click below to learn more about the many different diseases that can spread between animals and humans.

Diseases