TABLE 1.
Comparison of GBS culture detection methods with vaginal and vaginoanorectal samples from 1,250 pregnant women
| Specimen type (total no. of specimens) | No. of positive cultures detected (relative sensitivity [%] vs all methods)
|
||||||
|---|---|---|---|---|---|---|---|
| Direct inoculation in GM
|
Subculture from selective broth onto:
|
All methods | |||||
| Plates anaerobiosis | Plates with cover slide, aerobiosis | Tubes | Blood agar plates | GM plates, anaerobiosis | GM tubes | ||
| vaginal | |||||||
| First phase (400) | 52 (93) | NDa | ND | 54 (96) | 54 (96) | ND | 56 (100) |
| Second phase (400) | ND | ND | 50 (96) | 52 (100) | 52 (100) | ND | 52 (100) |
| Vaginoanorectal (450) | 85 (96) | 85 (96) | 85 (96) | 73 (82) | 79 (89) | 79 (89) | 89 (100) |
a
ND, not done.