Table 6 A comparison of the expected and observed result, colour of colonies and sensitivity
| Â | ChromID ESBL | Brilliance ESBL | Drigalski (BLSE agar) | MacConkey (BLSE agar) | CHROMagar ESBL |
|---|---|---|---|---|---|
Observed /Expected ESBL A -positive | 51/51 | 51/51 | 50/51 | 50/51 | 51/51 |
Observed/Expected AmpC-positive | 32/36 | 31/0 | 36/36 | 36/36 | 23/0 |
Expected colour of colonies | Colourless | Colourless | Blue | White | Colourless |
Colour of Salmonella colonies | Colourless (n=62) Pink (n=3) | Colourless (n=61) Pink (n=3) | Blue | Pale pink | Colourless |
Colour of Shigella sonnei colonies | Pink | Blue | Blue | Pale pink | Pink |
Colour of Shigella flexneri colonies | Colourless | Colourless | Blue | Pale pink | Colourless |
Sensitivity (95% CI*) | 95% (90.4-99.6) | 93% (87.6-98.4) | 99% (96.9-100) | 99% (96.9-100) | 85% (77.5-92.5) |
Sensitivity ESBL A (95% CI*) | 100% | 100% | 98% (94.2-100) | 98% (94.2-100) | 100% |
Sensitivity AmpC (95% CI*) | 89% (78.8-99.2) | 83% (70.7-95.3) | 100% | 100% | 64% (48.3-79.7) |