Table 1 Prevalence (%) and loads of chigger infestations, seroprevalence (%) of Orientia tsutsugamushi (OT) exposure, and OT positivity rate (%) in chiggers among small mammal hosts in Taiwan during 2006–2010
From: Surveillance of potential hosts and vectors of scrub typhus in Taiwan
Host species | No. of captures (% of total) | No. of counties | Prevalence (%) of chiggers | Mean # of chiggers/host (±SE)a | Total chiggers (% of all) | Seroprevalence (no. of assayed) | OT positivity rate (no. of assayed) |
|---|---|---|---|---|---|---|---|
Shrews | Â | Â | Â | Â | Â | Â | Â |
  Suncus murinus | 272 (21.2) | 8 | 16.2 | 12.8 ± 3.3 | 3,469 (2.7) | NA | 10.5 (19) |
Rodents | Â | Â | Â | Â | Â | Â | Â |
  Apodemus agrarius | 24 (1.9) | 4 | 54.2 | 82.3 ± 18.2 | 1,975 (1.5) | 57.9 (19) | 0 (13) |
  Bandicota indica | 83 (6.5) | 6 | 45.8 | 51.7 ± 11.2 | 4,288 (3.3) | 35.8 (81) | 51.9 (27) |
  Callosciurus erythraeus | 2 (0.2) | 1 | 0 | 0 | 0 (0) | 0 (1) | NA |
  Mus caroli | 144 (11.2) | 8 | 19.4 | 1.9 ± 0.5 | 271 (0.2) | 16.1 (124) | NA |
  Mus musculus | 47 (3.7) | 6 | 14.9 | 2.3 ± 1.1 | 109 (0.1) | 56.5 (46) | NA |
  Niviventer coninga | 2 (0.2) | 2 | 0 | 0 | 0 (0) | 100 (1) | NA |
  Rattus exulans | 26 (2.0) | 1 | 34.6 | 14.8 ± 4.6 | 385 (0.3) | 15.4 (26) | 66.7 (9) |
  Rattus losea | 626 (48.7) | 9 | 61.3 | 156.9 ± 11.2 | 98,239 (76.4) | 46.2 (520) | 54.8 (230) |
  Rattus norvegicus | 11 (0.9) | 6 | 9.1 | 79.3 ± 79.3 | 872 (0.7) | 20.0 (10) | 0 (1) |
  Rattus tanezumi | 48 (3.7) | 1 | 100 | 394.0 ± 28.5 | 18,912 (14.7) | 91.7 (48) | 95.8 (48) |
Overall | 1,285 | 9 | 44.5 | 100.0 ± 6.2 | 128,520 | 43.0 (876) | 55.9 (347) |