West Nile Virus

Fight the Bite!
Welcome to the Washtenaw County West Nile virus site! Follow the links below to learn more about the virus, including how to prevent yourself, your family, and your community members from becoming infected.

West Nile Virus Activity in Washtenaw County - 2014

Human Cases:
WNV Fever

Human Cases:

Human Deaths

Blood Donors

Horse Cases

Animal Cases








Mosquito Monitoring in Washtenaw County - 2014

Location of Mosquito Trap # of Mosquito Pools Tested* Date of Most Recent Test # of West Nile Positive Pools Date(s) of West Nile Positive Pools
Central Ann Arbor, 48104 11 8/20/14 0 -
Westside Ann Arbor, 48103 5 8/20/14 0 -
Pittsfield Township, 48108 5 8/20/14 0 -
Ypsilanti, 48198 3 8/5/14 0 -
Dexter, 48130 6 8/3/14 0 -

*A mosquito pool is a group of 5-25 mosquitoes gathered from one site on one evening.

2014 Map of Mosquito Testing in Southeast Michigan

Archive of West Nile Virus Activity (2002-2013)

Dead Bird Reporting

American Crow (Corvus brachyrhynchos)

Dead birds, especially dead crows, ravens or blue jays, can be an indicator of West Nile virus in a particular geographic area. We accept reports of dead birds and track them in a database. The Washtenaw County Public Health Department will not be testing any dead birds for West Nile virus. To report a dead bird, please do one of the following:

  • Call the Washtenaw County West Nile Virus Information Line at (734) 544-6750

For More Information:


Page updated 8/22/14

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