Table 1.
Prevalence and distribution of LACV SI+ and I+ mosquitoes in the 2006 and 2007 collections
| I+ | S+ | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2006 | 2007 | 2006 | 2007 | |||||||||
| County, State | PosMos | Total Tested | Prev | PosMos | Total Tested | Prev | Pos Mos | Total Tested | Prev | PosMos | Total Tested | Prev |
| Clayton, IA | N/A | N/A | N/A | 3 | 198 | 0.015 | N/A | N/A | N/A | 0 | 198 | 0 |
| Crawford, WI | 12 | 555 | 0.022 | 68 | 1561 | 0.044 | 1 | 555 | 0.0018 | 4 | 1561 | 0.0026 |
| Iowa, WI | 22 | 792 | 0.028 | 4 | 188 | 0.021 | 0 | 792 | 0 | 0 | 188 | 0 |
| LaCrosse, WI | 12 | 605 | 0.02 | 129 | 3097 | 0.042 | 0 | 605 | 0 | 0 | 3097 | 0 |
| Lafayette, WI | 35 | 902 | 0.039 | 19 | 275 | 0.069 | 0 | 902 | 0 | 4 | 275 | 0.0145 |
| Monroe, WI | 1 | 183 | 0.006 | 42 | 1005 | 0.042 | 0 | 183 | 0 | 0 | 1005 | 0 |
| Vernon, WI | 37 | 1122 | 0.033 | 45 | 1770 | 0.025 | 1 | 1122 | 0.0009 | 0 | 1770 | 0 |
| Houston, MN | 89 | 1744 | 0.051 | 51 | 1318 | 0.039 | 0 | 1744 | 0 | 7 | 1318 | 0.0053 |
| Winona, MN | 24 | 858 | 0.028 | 74 | 1652 | 0.045 | 0 | 858 | 0 | 0 | 1652 | 0 |
| Total | 232 | 6761 | 432 | 11064 | 2 | 6761 | 15 | 11064 | ||||
| Overall Prevalence** | 0.034 | 0.039 | 0.0003 | 0.0014 | ||||||||
*Prevalence was determined by dividing the number of positive mosquitoes by the number tested for each county
**Overall prevalence was determined by dividing the total number of positive mosquitoes by the total number of mosquitoes tested each year