TABLE 6.
Populations and reductions (log10 CFU/ml) of E. coli O157:H7 on TS as affected by exposure to alkaline cleaner for 2 min before exposure to sanitizers
| Treatment temp (°C) | Strain | Treatmenta | Population (log10 CFU/ml)
|
|
|---|---|---|---|---|
| After treatmentb | Reduction | |||
| 4 | EDL 933 | Control | 8.15 | 0.97 |
| Cleaner 5 | 8.11 | 1.01 | ||
| Cleaner 7 | 4.47 | 4.65 | ||
| FRIK 816-3 | Control | 7.74 | 1.01 | |
| Cleaner 5 | 8.29 | 0.46 | ||
| Cleaner 7 | 3.36 | 5.39 | ||
| 12 | EDL 933 | Control | 7.92 | 0.92 |
| Cleaner 5 | 7.82 | 1.01 | ||
| Cleaner 7 | 3.79 | 5.05 | ||
| FRIK 816-3 | Control | 8.32 | 1.14 | |
| Cleaner 5 | 8.31 | 1.15 | ||
| Cleaner 7 | 3.28 | 6.18 | ||
a
See Table 1 for description of cleaners.
b
Within treatment temperature and strain, initial populations were the same for all treatments. Cells were exposed to 0.05% peptone (control) or cleaners at 4 or 12°C for 2 min before neutralization with 2× DE broth and enumeration.