TABLE 4.
Differentiation of S. enterica subpopulations and serotypes by the tetracycline class of antibiotic compounds
| 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 | |||
| Chlortetracycline | 0.25-25 | 11C | 0.063 | 0.739 | 0.528 | 0.723 | 0.000 |
| Oxytetracycline | 0.25-25 | 20B | 0.149 | 0.514 | 0.406 | 0.276 | 0.000 |
| Rolitetracycline | 0.2-20 | 13B | 0.216 | 0.831 | 0.694 | 0.475 | 0.000 |
| Tetracycline | 0.08-8 | 12B | 0.556 | 0.297 | 0.780 | 0.081 | 0.000 |
a
A P of <0.01 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.