TABLE 2.
Differentiation of S. enterica subpopulations and serotypes by antibiotic compounds that differentiate between monomorphic subpopulations of serotype Enteritidis
| Compound name | Concn range of antibiotic (μg/ml) | PM plate no. |
P of similarity to wt serotype Enteritidis PT13aa
|
||||
|---|---|---|---|---|---|---|---|
| BF serotype Enteritidis PT13a | Serotype Enteritidis PT4 | Serotype Typhimurium | Serotype Heidelberg | Serotype Newportb | |||
| Amoxicillin | 0.1-10 | 11C | 0.000 | 0.006 | 0.001 | 0.026 | 0.000 |
| Carbenicillin | 1.3-130 | 14A | 0.000 | 0.052 | 0.003 | 0.108 | 0.500 |
| d-Serine | 347-34,700 | 17A | 0.000 | 0.004 | 0.731 | 0.213 | 0.240 |
| Oxacillin | 13-1,300 | 12B | 0.000 | 0.379 | 0.292 | 0.546 | 0.355 |
| Penicillin G | 1-100 | 12B | 0.000 | 0.014 | 0.006 | 0.083 | 0.000 |
| Phenethicillin | 18-1,800 | 19 | 0.000 | 0.061 | 0.019 | 0.182 | 0.247 |
| Sodium selenite | 30-3,000 | 16A | 0.000 | 0.060 | 0.682 | 0.005 | 0.069 |
a
A probability (P) of <0.001 indicates a significant difference.
b
Serotype Newport has multiple antibiotic resistances; thus, it has an origin of antibiotic resistance that is fundamentally different to that of serotype Enteritidis that correlates with single-nucleotide polymorphisms.