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Zones of inhibition of S. enterica strains E40, E40V and E40E with the following antibiotics: novobiocin (1.5 μg/disc), polymyxin B (3 μg/disc), and ampicillin (10 μg/disc).
| Strain | Novobiocina | Polymyxin B | Ampicillin |
| E40 | 0.0b | 12.2 +/−0.3 | 25.8 +/−0.3 |
| E40V | 12.6 +/−0.5 | 12.9 +/−0.1 | 26.0 +/−0.8 |
| E40E | 11.1 +/−0.3 | 12.4 +/−0.2 | NDc |
aE40 significantly different from E40V and E40E (p < 0.01), n = 4. bValues are in mm +/−the standard error. cND, not determined.
