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How do people get infected with West Nile virus?

The main way that humans become infected with West Nile virus is through the bite of an infected mosquito. Mosquitoes become infected when they feed on infected birds. Humans do not become infected through direct contact with other humans, horses, birds, or other animals.

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Can West Nile virus be spread through blood transfusions?

Yes, but it occurs rarely. Blood banks are now screening blood to make sure that it does not contain the virus.

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I am pregnant. If I get West Nile virus, is my baby at risk?

In the United States, one case where a mother gave her baby West Nile virus was documented during 2002. Experts don’t yet know how much risk there is to an unborn baby. Pregnant women should try to avoid infection by wearing protective clothing and using repellents containing DEET. Pregnant women who become sick with a high fever and stiff neck should see their doctor as soon as possible.

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Are hunters who field dress wild game birds at risk for West Nile virus?

There is no evidence that West Nile virus can be spread directly from birds or mammals to humans through direct blood contact. However, hunters are always urged to take proper precautions and wear rubber gloves when field dressing game.

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Can a person get West Nile virus by eating infected game birds?

Proper cooking kills the virus. There is most likely no danger associated with eating well-cooked wild game that might be infected.

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Katie Mullaly
Public Information Officer
Summit County Health Department
6505 N. Landmark Drive
Park City, Utah
Phone: 435-615-3951
Fax: 435-615-3926
kmullaly@lhd.utah.gov

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