Table 1.
The number of ixodid ticks classified by species and developmental stage, and MIR of TBEV in this study
| Species | Developmental stages | Number of ticks | Number of pools | Positive pools | MIR (%)a |
|---|---|---|---|---|---|
| Haemaphysalis longicornis | Larvaeb | 350 | 22 | 0 | 0 |
| Nymphc | 10,436 | 460 | 6 | 0.06 | |
| Adult (male)d | 221 | 106 | 0 | 0 | |
| Adult (female)d | 849 | 329 | 1 | 0.12 | |
| Subtotal | 11,856 | 917 | 7 | 0.06 | |
| Haemaphysalis flava | Larvae | 197 | 11 | 0 | 0 |
| Nymph | 710 | 163 | 0 | 0 | |
| Adult (male) | 108 | 79 | 1 | 0.93 | |
| Adult (female) | 134 | 91 | 1 | 0.75 | |
| Subtotal | 1,149 | 344 | 2 | 0.17 | |
| Ixodes nipponensis | Larvae | 0 | 0 | 0 | 0 |
| Nymph | 23 | 9 | 1 | 4.35 | |
| Adult (male) | 8 | 8 | 0 | 0 | |
| Adult (female) | 11 | 11 | 0 | 0 | |
| Subtotal | 42 | 28 | 1 | 2.38 | |
| Ixodes persulcatus | Larvae | 6 | 3 | 0 | 0 |
| Nymph | 0 | 0 | 0 | 0 | |
| Adult (male) | 0 | 0 | 0 | 0 | |
| Adult (female) | 0 | 0 | 0 | 0 | |
| Subtotal | 6 | 3 | 0 | 0 | |
| Total | Larvae | 553 | 36 | 0 | 0 |
| Nymph | 11,169 | 632 | 7 | 0.06 | |
| Adult (male) | 337 | 193 | 1 | 0.30 | |
| Adult (female) | 994 | 431 | 2 | 0.20 | |
| Total | 13,053 | 1,292 | 10 | 0.08 | |
aMIR: number of positive pools/total number of ticks assayed; b1–50 larvae/pool; c1–30 nymphs/pool; d1–5 adults/pool. MIR = minimum infection rate; TBEV = tick-borne encephalitis virus.