TABLE 3.
Relationship between the expression of curli, the presence of stx1, and the production of biofilm by top 7 serogroup strainsa
| Serogroup | No. of isolates | % motile isolates | % of isolates positive for rpoS | % of isolates expressing curli | % of isolates expressing curli and positive for stx1 | % of isolates forming biofilms | % of isolates forming biofilms, expressing curli, and positive for stx1 |
|---|---|---|---|---|---|---|---|
| O26 | 102 | 73.1 A | 3.2 A | 82.3 AB | 31.4 A | 6.9 | 3.9 |
| O45 | 102 | 93.1 BC | 0.1 A | 78.4 A | 26.4 A | 7.8 | 1.0 |
| O103 | 157 | 86.6 AB | 19.8 B | 78.3 A | 34.4 A | 5.1 | 1.3 |
| O111 | 12 | 58.33 A | 0.0 A | 66.7 A | 66.7 AB | 16.7 | 0.0 |
| O121 | 102 | 91.0 ABC | 16.7 B | 73.5 A | 34.3 A | 5.9 | 1.0 |
| O145 | 35 | 69.7 A | 93.9 C | 68.6 A | 28.6 A | 0.0 | 0.0 |
| O157 | 235 | 95.7 C | 87.2 C | 92.8 B | 85.7 B | 7.6 | 5.4 |
a
Data in columns with different letters differ significantly (P < 0.05).