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 1
Prevalence of infection by Borrelia burgdorferi sensu lato (%) 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) | t |
| 1994 | 220 | 31.3 ± 6.2 | 878 | 27.3 ± 3.0 | 1.2 |
| 1995 | 232 | 34.9 ± 6.3 | 833 | 25.2 ± 3.0 | 2.7 |
| 1996 | 500 | 46.8 ± 4.5 | 2,388 | 35.5 ± 2.0 | 4.5 |
| 1997 | 451 | 25.0 ± 5.7 | 1,535 | 27.9 ± 2.3 | 0.9 |
| 1998 |
394 |
27.4 ± 4.5 |
1,808 |
28.9 ± 2.1 |
0.6 |
| Total | 1,797 | 35.1 ± 2.2 | 7,442 | 30.0 ± 1.1 | 4.1 |
±2mp = confidence interval based on double sampling error.
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