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Table 6 Filter efficacy (mean cfu/ml at 22°C) of filter type 1–3

From: Hygienic safety of reusable tap water filters (Germlyser®) with an operating time of 4 or 8 weeks in a haematological oncology transplantation unit

Operating time (weeks) trial 2/filter type 1 (n samples) trial 3 (filter type 2) (n samples) trial 4 (filter type 3) (n samples)
1 3.1 ± 5.9 (78) 7.3 ± 8.8 (54) 14.4 ± 17.5 (18)
4 - 20.0 ± 27.4 (54) 3.8 ± 4.6 (18)
8 - - 6.3 ± 11.5 (18)