TABLE 3.
Temporal comparison of early-aliquot carrot broth-enhanced PCR and retrospective direct swab PCR detection rates for 76 specimens that initially screened positive for S. agalactiae by overnight carrot broth culture
| No. of specimens | Early-aliquot carrot broth-enhanced PCR |
% positive from remnant direct swab PCR | P valuea | |
|---|---|---|---|---|
| Collection interval (h) | % positive | |||
| 12 | <3 | 83.3 | 91.7 | - |
| 12 | 3.00-3.99 | 50.0 | 75.0 | - |
| 10 | 4.00-4.99 | 80.0 | 80.0 | - |
| 19 | 5.00-5.99 | 94.7 | 89.5 | - |
| 13 | 6.00-6.99 | 100.0 | 69.2 | - |
| 10 | ≥7 | 100.0 | 70.0 | - |
| Total (76) | 85.5 | 80.3 | 0.39 | |
a
-, P value is too small for valid statistical comparison.