Volume 7, Number 3—June 2001
Dispatch
Risk for Human Tick-Borne Encephalitis, Borrelioses, and Double Infection in the Pre-Ural Region of Russia
Edward I. Korenberg*
, Lidiya Ya. Gorban'†, Yurii V. Kovalevskii*, Vladimir I. Frizen†, and Andrei S. Karavanov‡
, Lidiya Ya. Gorban'†, Yurii V. Kovalevskii*, Vladimir I. Frizen†, and Andrei S. Karavanov‡Table 2
Prevalence of infection by tick-borne encephalitis virus (%) in unfed adult Ixodes persulcatus ticks collected from vegetation and removed from humans
| Ticks collected from vegetation |
Ticks removed from humans |
|||
|---|---|---|---|---|
| Year | No. | Prevalence of infection (p ± 2mp) | No. | Prevalence of infection (p ± 2mp) |
| 1994 | 664 | 21.5 ± 3.2 | 9,815 | 9.5 ± 0.6 |
| 1995 | 265 | 10.9 ± 3.8 | 8,523 | 5.5 ± 0.5 |
| 1996 | 167 | 35.3 ± 7.4 | 17,905 | 11.0 ± 0.5 |
| 1997 | 336 | 38.7 ± 5.3 | 12,443 | 8.8 ± 0.5 |
| 1998 |
244 |
15.2 ± 4.6 |
14,129 |
8.4 ± 0.5 |
| Total | 1,676 | 23.7 ± 2.1 | 62,816 | 9.0 ± 0.2 |
±2mp = confidence interval based on double sampling error; Coefficient of correlation was r = 0.7.
