Table 1.
Prevalence of Powassan (POWV) infection in adult ticks
| Collection site | Species | Number collected in: | Prevalence (95% CI) | ||
|---|---|---|---|---|---|
| October 2007 | May 2008 | Total | |||
| A | I. scapularis | 86 | 286 | 372 | 1.1 (0.3, 2.8) |
| D. variabilis | 0 | 128 | 128 | 0.0 (0.0, 3.5) | |
| B | I. scapularis | 213 | 643 | 856 | 1.4 (0.8, 2.5) |
| D. variabilis | 0 | 46 | 46 | 0.0 (0.0, 9.2) | |
| C | I. scapularis | ND | 107 | 107 | 0.9 (0.0, 5.6) |
| D. variabilis | ND | 48 | 48 | 0.0 (0.0, 8.9) | |
| Total | I. scapularis | 299 | 1,036 | 1,335 | 1.3 (0.8, 2.1) |
| D. variabilis | 0 | 222 | 222 | 0.0 (0.0, 2.1) | |
CI = confidence interval; ND = not determined.