Table 2. Bactericidal activity of water and 0.35% PAA on single and mixed species biofilms after 5 min of treatment.
| log (CFU/well) | |||
| Strain | Water | PAA (0.35%) | |
| Single species biofilm | B. subtilis 168 | 7.6±0.2 | – |
| B. subtilis NDmedical | 7.7±0.1 | 3.9±0.6 | |
| S.aureus AH478 | 9.3±0.1 | – | |
| Mixed species biofilm | B. subtilis 168 | 7.5±0.5 | – |
| S.aureus RN4220 | 8.2±0.4 | – | |
| B. subtilis NDmedical | 7.3±0.3 | 3.9±0.3 | |
| S.aureus RN4220 | 8.4±0.1 | 2.6±0.5 | |
Data shown are mean of three experiments ± standard deviation. Samples from which no survivor were recovered are represented by (−). Minimum detection of 2 logs CFU/well.