Table 2.
Characterization of captured rodents and collected ectoparasitic chiggers from scrub typhus outbreak sites in Chonburi, Thailand: demonstrating by indirect fluorescence antibody (IFA) seropositive rates and successful establishment rate of Orientia tsutsugaamushi isolates from different captured rodent species*
| Rodents species | Number of captured rodents | Mean of weight (g) | Ectoparasitic chigger | IFA positive number N (%) | Isolate number (%) | |||
|---|---|---|---|---|---|---|---|---|
| Male | Female | Total | Number of infested rodent N (%) | Number of collected chiggers N | ||||
| Bandicota indica | 55 | 34 | 89 | 331.2 | 56 (63) | 1,504 | 44 (49.4) | 4 (9) |
| Rattus rattus | 6 | 10 | 16 | 133.7 | 12 (75) | 238 | 11 (68.8) | 1 (9) |
| Rattus exulands | 3 | 6 | 9 | 28.3 | 0 (0) | 0 | 1 (11.1) | 0 (0) |
| Mus musculus | 1 | 2 | 3 | 10.0 | 1 (33) | 20 | 0 (0) | 0 (0) |
| Mus caroli | 2 | 1 | 3 | 17.0 | 1 (33) | 10 | 0 (0) | 0 (0) |
| Bandicota savilei | 1 | 1 | 2 | 175.0 | 2 (100) | 30 | 1 (50) | 0 (0) |
| Rattus norvegicus | 1 | 1 | 2 | 382.5 | 2 (100) | 20 | 0 (0) | 0 (0) |
| Rattus losea | 1 | 0 | 1 | 90.0 | 1 (100) | 24 | 1 (100) | 0 (0) |
| Menetes berdmorei | 4 | 2 | 6 | 209.2 | 2 (33) | 213 | ND | 1 (17) |
| Tupaia glis | 3 | 1 | 4 | 145.0 | 2 (50) | 189 | ND | 0 (0) |
| Total | 77 | 58 | 135 | 259.2 | 79 (59) | 2,248 | 58 (43) | 6 (4) |
*
ND = not determined.