Table 5 Total bacteria and P. aeruginosa (mean cfu/ml or/100 ml) of filters with operating time of 8 weeks (each n = 18 samples, trial 4)
Test parameter | cfu/ml | |||
|---|---|---|---|---|
week 2 | week 4 | week 8 | control before changing (final reduction %) | |
total bacteria 22°C | 14.4 | 3.8 | 6.3 | 607 (99) |
total bacteria 36°C | 29.4 | 14.5 | 34.7 | 635 (94.5) |
P. aeruginosa | 0 | 0 | 0.06* | 344 (97.5) |
Moulds | 1 | 0.1 | 0 | 5.2 (100) |