Table 1.

Descriptive values for Escherichia coli (E. coli), faecal coliforms and methicillin resistant Staphylococcus aureus (MRSA) enumerations (log colony forming units/sampling area) given for each sampling moment for CE units and control units

Sampling moment	E. coli	Faecal coliforms	MRSA
CE units
BCa	0.0–1.6–2.8	2.7 ± 1.5	2.9 ± 1.4
AC/ADb	0.0–0.0–2.8	0.0–1.9–3.8	0.0–0.0–0.0
W1c	0.0–0.0–2.8	0.0–2.7–3.8	3.3 ± 1.1
W5d	2.5 ± 1.6	3.1 ± 1.5	3.2 ± 1.1
Control units
BC	0.0–0.0–3.0	2.6 ± 1.7	2.9 ± 1.4
AC/AD	0.0–0.0–0.0	0.0–0.0–0.0	0.0–0.0–0.0
W1	0.0–0.0–3.0	0.0–2.0–3.6	3.2 ± 1.3
W5	2.5 ± 1.8	3.1 ± 1.6	2.9 ± 1.3

Mean and standard deviation are given for enumerations that are normally distributed. First quartile (Q1), median (Q2, bold characters) and third quartile (Q3) are given for enumerations that did not follow this distribution

^aBC, before cleaning

^bAC/AD, after cleaning/after disinfection

^cW1, after 1 week of production

^dW5, after 5 weeks of production