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Results of IFA of 3,401 serum samples from patients with acute febrile illness
| Antibody titer by IFA | No. (%) of sera with antibody to R. japonicaa
|
||
|---|---|---|---|
| Polyvalent antibody | IgG antibody | IgM antibody | |
| 1:40 | 676 (19.88) | 82 (2.41) | 109 (3.20) |
| 1:80 | ND | 55 (1.62) | 133 (3.91) |
| 1:160 | ND | 11 (0.32) | 50 (1.47) |
| 1:320 | ND | 9 (0.26) | 38 (1.12) |
| 1:640 | ND | 3 (0.09) | 33 (0.97) |
| 1:1,280 | ND | 6 (0.18) | 10 (0.29) |
| 1:2,560 | ND | 0 | 4 (0.12) |
| 1:5,120 | ND | 1 (0.03) | 0 |
| Total | 676 (19.88) | 167 (4.91) | 377 (11.08) |
ND, not done.
