*These data are provisional and may be revised or adjusted in the future.
Cumulative Dead Bird Infections by County - Michigan, 2004
| Alcona County | 1 |
| Allegan County | 4 |
| Barry County | 3 |
| Bay County | 6 |
| Berrien County | 4 |
| Branch County | 3 |
| Calhoun County | 2 |
| Cass County | 1 |
| Charlevoix County | 1 |
| Chippewa County | 1 |
| Clinton County | 2 |
| Crawford County | 1 |
| Dickinson County | 1 |
| Eaton County | 6 |
| Emmet County | 1 |
| Genesee County | 5 |
| Grand Traverse County | 3 |
| Hillsdale County | 2 |
| Huron County | 1 |
| Ingham County | 10 |
| Ionia County | 1 |
| Iosco County | 1 |
| Iron County | 1 |
| Jackson County | 8 |
| Kalamazoo County | 11 |
| Kent County | 5 |
| Lake County | 1 |
| Lapeer County | 2 |
| Lenawee County | 5 |
| Livingston County | 8 |
| Mackinac County | 1 |
| Macomb County | 1 |
| Manistee County | 1 |
| Marquette County | 3 |
| Mason County | 3 |
| Mecosta County | 3 |
| Midland County | 8 |
| Missaukee County | 4 |
| Monroe County | 1 |
| Montcalm County | 1 |
| Montmorency County | 2 |
| Muskegon County | 5 |
| Newaygo County | 7 |
| Oceana County | 2 |
| Ogemaw County | 2 |
| Oscoda County | 1 |
| Ottawa County | 10 |
| Roscommon County | 5 |
| Saginaw County | 59 |
| Saint Joseph County | 2 |
| Sanilac County | 1 |
| Shiawassee County | 6 |
| Tuscola County | 5 |
| Van Buren County | 4 |
| Washtenaw County | 7 |
| Wayne County | 6 |
| Wexford County | 4 |