Towards understanding inter-strain attachment variations of Escherichia coli during transport in saturated quartz sand - Transport of Multiple Escherichia Coli Transport in Saturated Porous Media - page 37

while group 2 and 3 saccharides are uncharged. The results are given in Fig. 3.3 . We were able to
derive the polysaccharide structure of 27 of the 54 strains we used. We observed that group 1
saccharides were more associated, but not statistically significant ( p = using Fisher's exact

test), with low attachment efficiencies than with high attachment efficiencies: six of the nine
strains with lowest attachment efficiencies had group 1 saccharides in their LPS structure, while
for the 12 strains with highest attachment efficiency only one had a group 1 saccharide. Group 2
and group 3 saccharides were equally distributed and were not associated with attachment
efficiencies (

0.13

p = 1 , Fisher's exact test).

Group 1 Group 2 Group 3

Strain Serotype Attachment eff.

1923 O139 0.44 X X X

2043 O29 0.45 X X X X X

2007 O45 0.46 X X X

2160 O124 0.46 X X X X

1991 O1 0.47 X X X

2621 O5 0.49 X X X X

2216 O58 0.51 X X X X

1876

O7 0.52 X X X X X

2312 O83 0.54 X X X X

1927

O16 0.54 X X X X

2000 O20 0.57

X X

1366 O23 0.64 X X X X

1875

O2 0.65 X X X

2602 O159 0.68

X

1712

O9 0.70 X X X

2203 O126 0.75

X X X X

1763 O7 0.75

X X X X X

1367

O101 0.79 X X

2171 O149 0.83

X X

2195 O21 0.86

X X X X

2153 O117 0.89

X X X X

2262 O66 0.99

X X X X

2606 O128 1.01

X X X

2637 O88 1.16

X X X

1625 O8 1.16

X

2059 O25 1.22 X X X X

1935 O77 1.25

X X

Figure 3.3: Serotype, structure of the lipopolysaccharide, grouped into saccharides

containing carboxyls and phosphate groups (Group 1), saccharides (Group 2),
and saccharides containing an amine group (Group 3). Strains were ordered with
increasing attachment efficiency