Table 2: Number of CFUs in H(0) samples from the four hospital units: median, interquartile range (IQR), mean and standard deviation value comparing data of the four units by the Mann-Whitney test.

Culture medium (A): cardiology and hemodynamic, 33 objects (B): first aid, 25 objects (C): intensive care unit, 29 objects (D): emergency unit, 12 objects value comparing data of the four units by the Mann-Whitney test
Median (IQR)Mean (SD)Median (IQR)Mean (SD)Median (IQR)Mean (SD)Median (IQR)Mean (SD)A versus BA versus CA versus DB versus CB versus DC versus D

TBC 36*9 (4 to 27)63.0 (157.6)24 (8 to 39)41.52 (86.9)2 (0 to 12)6.96 (9.8)7 (2.5 to 10)100.6 (318.1)0.1360.0050.2320.00070.0730.224
TBC 229 (3 to 26)63.7 (170.5)27 (5 to 41)37.2 (69.8)2 (0 to 9)6.14 (11.2)6 (0.5 to 17)133.8 (432.9)0.0950.0020.2330.00010.0660.181
E. coli 0 (—)1.7 (6.6)0 (0 to 1)0.4 (0.8)0 (—)0.03 (0.2)0 (—)6.1 (20.5)0.0480.0350.0580.0110.0430.089
Coliforms 1 (0 to 5)19.9 (68.5)8 (5 to 14)11.8 (13.6)0 (0 to 2)1.4 (2.8)1.5 (0 to 9)29.8 (90.1)0.0080.0060.680<0.0010.0880.128
Staphylococci 5 (2 to 14)44.7 (145.5)12 (3 to 25)23.7 (36.6)2 (0 to 3)4.8 (13.0)6.5 (2.5 to 9.5)88.7 (288.0)0.010.0020.5330.0060,1010.041
MRSA**0 (—)3 (10.0)0 (0 to 2)2.0 (4.5)0 (—)0.2 (0.7)0 (0 to 5)2.3 (3.2)0.0880.1140.0930.0040.4590.003
Moulds0 (0 to 1)1.4 (4.1)0 (0 to 3)2.4 (4.3)0 (—)0.07 (0.3)0 (0 to 1.5)3.8 (8.9)0.2240.0040.5510.0010.3170.082

TBC 36 and TBC 22: total bacterial count incubating at 36°C and 22°C, respectively; **MRSA: methicillin-resistant Staphylococcus aureus.