Table 2.
Surviving Escherichia coli O157:H7 (log10 CFU/cm2) on spinach surfaces as a function of the interaction of antimicrobial treatment and days of aerobic storage at 5 °C.
| Storage Period (Days) | Encap 1 | Free-Eug | SDS-Mic | 200 HOCl | DW | Control |
|---|---|---|---|---|---|---|
| 0 | 3.1DEFG 2 | 2.3GHI | 5.0ABC | 2.7FGH | 5.3AB | 6.0A |
| 3 | 0.4K | 0.4K | 4.1CDE | 0.7JK | 4.7ABC | 5.9A |
| 5 | 0.4K | 0.4K | 3.8CDEF | 1.5IJK | 4.2BCD | 4.6BC |
| 7 | 0.4K | 0.6JK | 2.9EFGH | 0.8JI | 4.1CDE | 4.4BC |
| 10 | 0.4K | 0.4K | 1.7HIJ | 0.6JK | 3.9CDEF | 4.0CDE |
| p > 0.0001 | Pooled Standard Error = 0.3 | |||||
1 Antimicrobial treatments were: 1.0% sodium dodecyl sulfate (SDS) micelles loaded with 1.0% eugenol (Encap); 1.0% unencapsulated eugenol (Free-Eug); 1.0% SDS micelles unloaded (SDS-Mic); 200 ppm pH 7.0 free chlorine (200 HOCl); sterile distilled water (DW); inoculated, nontreated (Control). 2 Values depict least-squares means calculated from three identically completed replicates, each containing duplicate identically processed independent samples (n = 6). Means read across columns and rows that do not share capitalized letters (A, B, C, …) differ by two-way analysis of variance and Tukey’s Honestly Significant Differences Means Separation Test at p = 0.05.