TABLE 1.
O and H agglutinins in each group of patientsa
| Group (no. of patients) | S. typhi antigen | No. (%) of sera showing the following reciprocal antibody titer:
|
|||||
|---|---|---|---|---|---|---|---|
| 0 | 100 | 200 | 400 | 800 | >800 | ||
| 1 (1,400) | O | 236 (17) | 475 (34) | 425 (30) | 190 (14) | 72 (5) | 2 |
| H | 456 (33) | 315 (23) | 232 (16) | 190 (14) | 115 (8) | 92 (6) | |
| O or H | 175 (13) | 390 (28) | 369 (26) | 234 (17) | 139 (10) | 93 (6) | |
| 2 (45) | O | 21 (47) | 15 (33) | 7 (16) | 2 | 0 | 0 |
| H | 35 (78) | 4 (9) | 3 (7) | 1 | 2 | 0 | |
| O or H | 21 (47) | 14 (31) | 6 (13) | 2 | 2 | 0 | |
| 3 (290) | O | 272 (82) | 44 (13) | 15 (4) | 4 (1) | 0 | 0 |
| H | 307 (92) | 18 (5) | 4 (1) | 2 | 3 | 1 | |
| O or H | 264 (79) | 49 (15) | 14 (4) | 4 (1) | 3 | 1 | |
| 4 (265) | O | 245 (93) | 16 (6) | 3 (1) | 1 | 0 | 0 |
| H | 262 (99) | 3 (1) | 0 | 0 | 0 | 0 | |
| O or H | 242 (92) | 19 (7) | 3 (1) | 1 | 0 | 0 | |
a
For “O or H” entries, the patient’s highest titer is shown.