TABLE 2.
Number of repeat carriers that were positive for N. meningitidis carriage in each combination of rounds
| Round | No. of carriersa
|
|||
|---|---|---|---|---|
| RI-1 | RI-2 | OR | Total | |
| Two carriage rounds | ||||
| 1 + 2 | 36 | 29 | 19 | 84 |
| 1 + 3 | 9 | 0 | 1 | 10 |
| 1 + 4 | 10 | 0 | 2 | 12 |
| 2 + 3 | 19 | 0 | 8 | 27 |
| 2 + 4 | 3 | 0 | 4 | 7 |
| 3 + 4 | 9 | 0 | 9 | 18 |
| 1, 2 different ST | 1 | 1 | 3 | 5 |
| 2, 3 different ST | 3 | 0 | 0 | 3 |
| 1, 4 different ST | 2 | 0 | 0 | 2 |
| 1, 3 different ST | 0 | 0 | 0 | 0 |
| 2, 4 different ST | 2 | 0 | 1 | 3 |
| 3, 4 different ST | 1 | 0 | 2 | 3 |
| Total | 95 | 30 | 49 | 174 |
| Three carriage rounds | ||||
| 1 + 2 + 3 | 8 | 0 | 2 | 10 |
| 1 + 2 + 4 | 3 | 0 | 0 | 3 |
| 1 + 3 + 4 | 1 | 0 | 2 | 3 |
| 2 + 3 + 4 | 1 | 0 | 0 | 1 |
| 1 + 2, 4 different ST | 3 | 0 | 0 | 3 |
| Total | 16 | 0 | 4 | 20 |
a
The elapsed days from round 1 to subsequent rounds for each university were as follows. RI-1: round 2 (56 days), round 3 (185 days), round 4 (380 days). RI-2: round 2 (41 days); OR, round 2 (69 days), round 3 (218 days), round 4 (350 days).