TABLE 6.
Populations of late-logarithmic-growth-phase (13-h) L. monocytogenes cells recovered on TPA and TPAS following treatment with chlorine
| Chlorine concn (mg/liter) | Treatment time (min) | Mean population ± SE (log10
CFU/ml)a on:
|
|
|---|---|---|---|
| TPA | TPAS | ||
| 0 | 5 | a 8.73 ± 0.0219 | a 8.73 ± 0.1790 |
| 10 | a 8.77 ± 0.0133 | a 8.70 ± 0.2190 | |
| 2.0 | 5 | a 8.21 ± 0.0556 | b 7.56 ± 0.0760 |
| 10 | a 8.15 ± 0.0514 | b 7.61 ± 0.0982 | |
| 2.4 | 5 | a 7.54 ± 0.1880 | b 7.09 ± 0.0999 |
| 10 | a 7.47 ± 0.1270 | b 6.78 ± 0.1540 | |
| 6.0 | 5 | a 4.90 ± 0.1610 | b 4.03 ± 0.1590 |
| 10 | a 4.75 ± 0.1690 | b 3.30 ± 0.2960 | |
a
Values in the same row that are not preceded by the same letter are significantly different (P ≤ 0.05).