TABLE 6.
Duration of exposure (h) | Fraction surviving after biocide exposure under indicated growth conditionsa,b
|
|||
---|---|---|---|---|
Suspension | Glass biofilm | Copper biofilm | Galvanized bead biofilm | |
0 | 1.00 | 1.00 | 1.00 | 1.00 |
3 | 0.64 | 0.94 | 0.71 | 0.90 |
6 | 0.11 | 0.61 | 0.39 | 0.36 |
24 | <0.0014 | 0.008 | 0.005 | 0.004 |
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.