*These data are provisional and may be revised or adjusted in the future.
Cumulative Human Disease Cases by County - Louisiana, 2003
| Ascension Parish | 2 |
| Assumption Parish | 1 |
| Bossier Parish | 10 |
| Caddo Parish | 41 |
| Calcasieu Parish | 1 |
| Catahoula Parish | 1 |
| Claiborne Parish | 1 |
| De Soto Parish | 1 |
| East Baton Rouge Parish | 4 |
| East Feliciana Parish | 1 |
| Iberia Parish | 1 |
| Jefferson Davis Parish | 1 |
| Jefferson Parish | 3 |
| Lafourche Parish | 4 |
| Lincoln Parish | 2 |
| Livingston Parish | 6 |
| Morehouse Parish | 2 |
| Natchitoches Parish | 3 |
| Orleans Parish | 4 |
| Ouachita Parish | 3 |
| Rapides Parish | 3 |
| Richland Parish | 1 |
| St. Bernard Parish | 1 |
| St. Charles Parish | 1 |
| St. Helena Parish | 2 |
| St. Mary Parish | 1 |
| St. Tammany Parish | 7 |
| Tangipahoa Parish | 6 |
| Terrebonne Parish | 3 |
| Union Parish | 1 |
| Washington Parish | 2 |
| Webster Parish | 1 |
| West Carroll Parish | 3 |