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Presentation of rickettsial species according to the titer of Indirect Immunofluorescence Assay (IFA) tests*
| Species | 32 titer | 64 titer | 128 titer | 256 titer | 512 titer or more |
|---|---|---|---|---|---|
| Typhus group (N = 720) | 11 (2) | 12 (2) | 6 (1) | 2 (0.3) | 2 (0.3) |
| Spotted fever group (N = 720) | 163 (23) | 117 (16) | 84 (12) | 43 (6) | 5 (1) |
| Scrub typhus group (N = 360) | 13 (4) | 5 (1) | 14 (4) | 15 (4) | 34 (9) |
* Values are n (%) unless otherwise indicated
