West Nile virus is transmitted to humans by the bite of a female mosquito that has bitten an infected bird.  West Nile virus symptoms are present within 3-15 days after being bitten by the infected mosquito.  Culex mosquitoes, the type of mosquito most likely to carry West Nile virus breed in shallow, stagnant, polluted water.  Mosquitoes can breed in any stagnant water that lasts for more than a couple of days.



Personal Protection is the first line of defense against West Nile virus
    -  Avoid being outside at dawn or dusk
    -  Use an insect repellant containing DEET
    -  When outside wear light-colored long pants and long sleeved shirt
    -  Eliminate all standing water on or near your property
    -  Repair failed septic systems

Most people who become infected with West Nile virus will have either no symptoms or very mild symptoms.  However, some individuals will contract a more serious form of the virus that causes inflammation of the brain and surrounding tissues.  Seek medical attention immediately if you develop symptoms such as a high fever, muscle weakness, neck stiffness, sore joints, confusion, tremors or severe headache.

Purdue's Vector Biology Page

Learn to "Fight the Bite"

Two New Repellants Recommended by CDC