Table 4.
SFGR minimum field infection rates (MFIR) for ticks collected from four southwestern provinces of Chungcheongnam, Chungcheongbuk, Jeollanam and Jeollabuk in the Republic of Korea during 2013 by species of tick using the partial 17 kDa and ompA genes by nPCR
| Collected ticks | Developmental stage | No. of ticks/(no. of tested pools) | nPCR positive no. of Rickettsia sp. (MFIR)a | |
|---|---|---|---|---|
| 17 kDa | ompA | |||
| H. longicornis | Larvab | 4,296 (109) | 38 (0.88) | 33 (0.77) |
| Nymphc | 123 (31) | 8 (6.50) | 7 (5.70) | |
| Adult (male)d | 7 (5) | 4 (57.10) | 4 (57.10) | |
| Adult (female)d | 45 (23) | 2 (4.40) | 2 (4.40) | |
| Subtotal | 4,471 (168) | 52 (1.16) | 46 (1.03) | |
| H. flava | Larva | 1,291 (50) | 0 | 0 |
| Nymph | 263 (38) | 1 (0.38) | 0 | |
| Adult (male) | 11 (7) | 0 | 0 | |
| Adult (female) | 17 (13) | 0 | 0 | |
| Subtotal | 1,582 (108) | 1 (0.06) | 0 | |
| I. nipponensis | Larva | 401 (17) | 1 (0.25) | 1 (0.25) |
| Nymph | 5 (4) | 0 | 0 | |
| Adult (male) | 11 (7) | 3 (27.2) | 3 (27.2) | |
| Adult (female) | 14 (7) | 3 (21.4) | 3 (21.4) | |
| Subtotals | 431 (35) | 7 (1.62) | 7 (1.62) | |
| Totals | 6,484 (311) | 60 (0.93) | 53 (0.82) | |
aMFIR (minimum field infection rate/100 ticks) = No. of positive pools/No. of examined ticks in pools × 100, by species and stage of development
b1–69 larvae/pool
c1–25 nymphs/pool
d1–5 adults/pool