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L. monocytogenes strains used in this study
| Serogroup | Strain | Origin | Resistancea |
|---|---|---|---|
| 4 | H7962 | Sara Lee | Resistant |
| 1 | H7764 | Sara Lee | Resistant |
| 1 | C511 | Unknown | Sensitive |
| 4 | LJH389 | Unknown | Sensitive |
| 4 | LJH381 | Health Canada | Sensitive |
| 1 | C712 | CRIFS collection | Sensitive |
A resistant strain was defined as a strain having an initial tolerance of 4 μg of BC/ml of TSB; a sensitive strain was defined as a strain having an initial tolerance of <4 μg of BC/ml of TSB.
