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Ames test for Congo red with two S. enterica test strains
| Addition to agar | Mean no. of revertant colonies/plate ± SD (n = 3)
|
|||
|---|---|---|---|---|
| Strain TA100
|
Strain TA1538
|
|||
| S9 absent | S9 present | S9 absent | S9 present | |
| Congo red | 172 ± 7 | 123 ± 6 | 20 ± 3 | 19 ± 3 |
| Negative control | 165 ± 7 | 119 ± 8 | 21 ± 3 | 20 ± 3 |
| Positive control | 421 ± 18 | 313 ± 11 | 252 ± 25 | 252 ± 25 |
