Table 2 GBS isolation and prevalence rates by direct plating on a selective blood agar plate (CAP agar) and by enrichment on selective broth medium (LIM broth).
| n (%) | 95% CI | |
|---|---|---|
| Number examined | 4050 | |
| GBS‐positive | 728 (18.0) | 16.8 to 19.2 |
| Positive by direct plating/total positive | 561/728 (77.1) | 74.0 to 80.1 |
| Positive by direct plating/total women | 561/4050 (13.9) | 12.8 to 14.9 |
| Additional positive by enrichment/total positive | 167/728 (22.9) | 19.9 to 26.0 |
| Additional positive by enrichment/total women | 167/4050 (4.1) | 3.5 to 4.7 |