Dead birds collected in five northern Illinois counties have tested positive for West Nile virus, said Dr. Eric E. Whitaker, state public health director.
The birds were found in Boone, Kankakee, Lake, Ogle and Rock Island counties and confirmed positive by the Illinois Department of Agriculture Laboratory in Galesburg. A total of 20 birds in 15 counties now have been confirmed positive for West Nile virus in Illinois since state and local health departments began surveillance for the mosquito-borne disease on May 1. No human cases have been reported.
Other positive birds have been reported in the following counties: Adams, Champaign (two), DuPage (two), Kane, Madison (two), McHenry, McLean (two), Stephenson (two), Vermilion and Winnebago. In addition, two mosquito pools in DuPage County have been confirmed positive for West Nile.