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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

From: Molecular detection of Rickettsia species in ticks collected from the southwestern provinces of the Republic of Korea

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)
  1. aMFIR (minimum field infection rate/100 ticks) = No. of positive pools/No. of examined ticks in pools × 100, by species and stage of development
  2. b1–69 larvae/pool
  3. c1–25 nymphs/pool
  4. d1–5 adults/pool
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