WebMD
Font Size
A
A
A

West Nile virus transmission cycle

Illustration copyright 2005. Adapted from the U.S. Centers for Disease Control and Prevention. Available online: http://www.cdc.gov/

Mosquitoes become infected with West Nile virus when they bite infected birds and then may transmit the virus to humans and animals when they bite to take blood.

Primary Medical Reviewer Martin Gabica, MD
- Family Medicine
Specialist Medical Reviewer W. David Colby IV, MSc, MD, FRCPC
- Infectious Disease
Last Updated November 13, 2006

WebMD Medical Reference from Healthwise

Last Updated: November 13, 2006
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
@ 1995-2007, Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.