Table 2

Comparison of colony numbers

Number of bacterial colonies at different sites (see Fig. 1)


Room air (A1–A3)
 Exhaust (B1 and B2)

Patient number
 Pre
 Post
 Change
 Pre
 Post
 Change
1
 112
 71
 -41
 29
 27
 -2
2
 102
 62
 -40
 32
 30
 -2
3
 99
 70
 -29
 24
 22
 -2
4
 98
 73
 -25
 22
 21
 -1
5
 97
 62
 -35
 27
 25
 -2
6
 120
 67
 -53
 25
 23
 -2
7
 89
 63
 -26
 37
 25
 -12
8
 129
 73
 -56
 24
 22
 -2
9
 124
 68
 -56
 27
 23
 -4
10
 296
 141
 -155
 90
 86
 -4
11
 98
 70
 -28
 30
 24
 -6
12
 82
 63
 -19
 31
 30
 -1
13
 96
 66
 -30
 22
 20
 -2
14
 91
 64
 -27
 28
 25
 -3
15
 90
 68
 -22
 31
 29
 -2
16
 83
 66
 -17
 27
 26
 -1

Huang et al. Critical Care 2003 7:R13   doi:10.1186/cc1888