TABLE 1.
Carriage rate and serogroup prevalence of N. meningitidis in Burkina Faso at four sampling times in 2009
| Parameter | Sampling campaign |
Total | |||
|---|---|---|---|---|---|
| S1 | S2 | S3 | S4 | ||
| Total no. of samples | 5,024 | 5,121 | 5,074 | 5,107 | 20,326 |
| No. (%) of N. meningitidis isolates | 206 (4.10) | 270 (5.27) | 171 (3.37) | 162 (3.17) | 809 (3.98) |
| No. (%) of NmA isolates | 21 (0.42) | 32 (0.62) | 12 (0.24) | 15 (0.29) | 80 (0.39) |
| No. (%) of NmC isolates | 0 | 4 (0.08) | 0 | 0 | 4 (0.02) |
| No. (%) of NmW135 isolates | 27 (0.54) | 11 (0.21) | 20 (0.39) | 12 (0.23) | 70 (0.34) |
| No. (%) of NmX isolates | 8 (0.16) | 40 (0.78) | 25 (0.49) | 17 (0.33) | 90 (0.44) |
| No. (%) of NmY isolates | 116 (2.31) | 158 (3.09) | 83 (1.64) | 100 (1.96) | 457 (2.25) |
| No. (%) of nongroupable isolates | 34 (0.68) | 25 (0.49) | 31 (0.61) | 18 (0.35) | 108 (0.53) |