Table 2.
Virulence gene distribution by ST131 subclone among 71 ST131 Escherichia coli isolates
| Functional category | Genea | Within ST131 |
Within H30 ST131 subclone |
||||
|---|---|---|---|---|---|---|---|
| No. (%) of strains carrying gene |
Pb | No. (%) of strains carrying gene |
Pb | ||||
| H30 (n = 62) | Non-H30 (n = 9) | H30-Rx (n = 47) | Other H30 (n = 15) | ||||
| Adhesin | iha | 60 (97) | 5 (56) | 0.002 | 45 (96) | 15 (100) | |
| Toxin | sat | 61 (98) | 3 (33) | <0.001 | 46 (98) | 15 (100) | |
| Siderophores | iroN | 1 (2) | 2 (22) | 0.04 | 1 (2) | 0 | |
| iutA | 56 (90) | 5 (56) | 0.02 | 42 (89) | 14 (93) | ||
| Protectins | kpsMII | 53 (85) | 8 (89) | 44 (94) | 9 (60) | 0.004 | |
| K1 | 2 (3) | 3 (33) | 0.01 | 1 (2) | 1 (7) | ||
| K5 | 17 (27) | 1 (11) | 9 (19) | 8 (53) | 0.02 | ||
| Other | ibeA | 0 | 6 (67) | <0.001 | 0 | 0 | |
a
Virulence genes listed are those that yielded P values of <0.05 in at least one comparison.
b
Determined by Fisher's exact test. Values are shown where P is <0.05; for all other comparisons, the differences were not significant.