Table 2.
Numbers of persistent carriers and carriers subject to clonal replacement or clearance of carriage
| Time points (period) | No. (%) |
|||
|---|---|---|---|---|
| Persistent carriersa | Carriers subject to: |
Total | ||
| Clonal replacementb | Clearance of carriagec | |||
| November to December, December to February (1–2 mo) | 53 (91) | 5 (9) | 0 | 58 |
| November to February, February to May (3 mo) | 36 (78) | 7 (15) | 3 (7) | 46 |
| November to May, December to May (5–6 mo) | 15d (45) | 12 (36) | 6 (18) | 33 |
a
Presence of a strain with the identical/similar capsule type, PorA type, FetA type, and ST detected at both time points, or assumed if carriage of the persistent clone was detected at a later time point.
b
Presence of a strain with a different ST or different PorA and FetA types where the ST type has not been determined.
c
No meningococcal isolates detected.
d
P values of <0.0001 and 0.004 and odds ratios of 12.7 (95% CI, 4 to 40) and 4.2 (95% CI, 1.6 to 11.2) were obtained in comparisons with the November to December/December to February and November to February/February to May periods of carriage, respectively.