TABLE 2.
Test results of spiked stool specimens
| Stool no. and amt (CFU/ml) | Result of test: |
|||
|---|---|---|---|---|
| 24-h culturea | PCR | 48-h culture | 72-h culture | |
| Stool 1 | ||||
| 1.5 × 107 | + | + | NA | NA |
| 1.5 × 106 | + | + | NA | NA |
| 1.5 × 105 | + | + | NA | NA |
| 1.5 × 104 | + | + | NA | NA |
| 1.5 × 103 | + | + | NA | NA |
| 1.5 × 102 | + | + | + | NA |
| 15 | − | + | + | NA |
| 1.5 | − | + | + | NA |
| 0.15 | − | + | − | + |
| 0.015 | − | + | − | − |
| Stool 2 | ||||
| 1.5 × 107 | + | NA | NA | |
| 1.5 × 106 | + | NA | NA | |
| 1.5 × 105 | + | NA | NA | |
| 1.5 × 104 | + | NA | NA | |
| 1.5 × 103 | + | NA | NA | |
| 1.5 × 102 | + | NA | NA | |
| 15 | + | + | NA | NA |
| 1.5 | + | + | NA | NA |
| 0.15 | + | + | NA | NA |
| 0.015 | − | − | + | NA |
| Stool 3 | ||||
| 1.5 × 107 | + | NA | NA | |
| 1.5 × 106 | + | NA | NA | |
| 1.5 × 105 | + | NA | NA | |
| 1.5 × 104 | + | NA | NA | |
| 1.5 × 103 | + | NA | NA | |
| 1.5 × 102 | + | NA | NA | |
| 15 | + | + | NA | NA |
| 1.5 | + | + | NA | NA |
| 0.15 | − | − | − | − |
| 0.015 | − | − | − | − |
a
+, positive by culture or reactive by PCR; −, negative; NA, not applicable.