TABLE 3.
Expt | Cell density (cells/ml) | Fraction surviving after biocide exposure for indicated timea,b
|
||
---|---|---|---|---|
3 h | 6 h | 24 h | ||
1 | 1.5 × 106 | 0.27 | 0.037 | <0.001 |
1.3 × 105 | 0.17 | 0.022 | <0.001 | |
2 | 1.0 × 106 | 0.40 | 0.20 | 0.09 |
9.0 × 104 | 0.14 | 0.02 | <0.00003 | |
3 | 4.5 × 106 | 0.38 | 0.23 | 0.013 |
4.5 × 105 | 0.24 | 0.13 | 0.000007 | |
5.1 × 104 | 0.24 | 0.12 | 0.00008 |
Cells were suspended in D/E broth for 30 min following biocide exposure.
Calculated as biocide-exposed CFU divided by control CFU for the same exposure duration from an average of two independent experiments.