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Infection rates are shown for all species in which West Nile virus was detected in 2004. The Microsoft Excel® add-in developed by Biggerstaff (v 3.0, 2006) was used to calculate bias-corrected maximum likelihood estimates (MLEs) and 95% confidence intervals (CIs).
| Species | MLE infection rate | Lower limit (95% CI) | Upper limit (95% CI) |
|---|---|---|---|
| Culex quinquefasciatus | 9.40 | 5.92 | 14.30 |
| Cx. salinarius | 9.38 | 7.11 | 12.18 |
| Cx. tarsalis | 2.19 | 0.58 | 5.89 |
| Aedes vexans | 2.06 | 0.77 | 4.56 |
