Table 2.
Results of capsule-associated phenotype tests for a selection of E. coli ST131 strains
| Strain | Capsule formation | Biofilm | Invasion of T24 cells | Serum resistance | Persistence in U937 | Serotype | |||
|---|---|---|---|---|---|---|---|---|---|
| 37°C | 25°C | 37°C | T0 | T3 | T0 | T24 | |||
| UTI18 | +++ | +++ | + | ++ | 7.67E + 06 | 1.17E + 08 | 2.44E + 05 | 8.56E + 04 | O 25: K+: H- |
| UTI24 | +++ | +++ | ++ | + | 1.00E + 07 | 1.50E + 08 | 3.67E + 05 | 1.33E + 04 | O 25: K+: H- |
| UTI32 | ++++ | +++ | + | +++ | 3.67E + 06 | 1.17E + 08 | 2.89E + 05 | 1.66E + 04 | O 25: K-: H 4 |
| UTI62 | ++ | ++ | + | + | 6.50E + 06 | 2.50E + 08 | 4.94E + 05 | 4.72E + 04 | O 25: K+: H- |
| UTI188 | ++ | ++ | + | ++ | 5.67E + 06 | 2.67E + 08 | 3.61E + 05 | 1.28E + 05 | O 25:K 20, K 23:H 4 |
| UTI226 | +++ | ++ | +++++ | ++ | 4.17E + 06 | 1.00E + 08 | 3.11E + 05 | 1.56E + 04 | O 25: K 16: H- |
| UTI306 | +++ | +++ | + | +++ | 2.00E + 06 | 1.50E + 08 | 4.72E + 05 | 1.00E + 04 | O 25: K+: H- |
| UTI423 | +++ | +++ | ++ | ++++ | 1.83E + 06 | 1.50E + 08 | 2.78E + 05 | 4.33E + 04 | O 25: K 5: H 4 |
| UTI570 | ++ | ++ | +++++ | ++ | 1.00E + 07 | 1.17E + 08 | 4.22E + 05 | 2.17E + 04 | NT |
| UTI587 | ++ | ++ | ++ | ++ | 4.33E + 06 | 4.83E + 08 | 3.72E + 05 | 8.33E + 04 | O 25: K+: H- |
Phenotype results are presented as an arbitrary score of: + low phenotypic expression, ++ medium phenotypic expression, +++ high phenotypic expression.