Table 5.
Resistance Score and Virulence Score in Relation to Sequence Type 131 (ST131) Status Within Each Resistance Category Among 360 Escherichia coli Clinical Isolates
| Variable | Resistance Category | Non-ST131 | ST131 | P Value b | ||
|---|---|---|---|---|---|---|
| No. of Isolates | Median Score (Range) | No. of Isolates | Median scorea (Range) | |||
| Resistance score | ESC-RS | 60 | 3 (0–6) | 60 | 4 (2–6) | .02 |
| FQ-R | 30 | 2 (1–4) | 90 | 2 (1–4) | .85 | |
| FQ-S | 111 | 0 (0–2) | 9 | 1 (0–2) | .003 | |
| Virulence score | ESC-RS | 60 | 6 (1–17) | 60 | 10 (6–14.75) | < .001 |
| FQ-R | 30 | 8 (1–15) | 90 | 9 (6–12) | < .001 | |
| FQ-S | 111 | 11 (1–20) | 6 | 11 (9–13) | .95 | |
Abbreviations: ESC-RS, extended-spectrum cephalosporin-reduced susceptibility (whether or not fluoroquinolone-resistant); FQ-R, fluoroquinolone-resistant and ESC-susceptible; FQ-S, fluoroquinolone-susceptible and ESC-susceptible.
aBoldface indicates results for the comparison group with a significantly higher score.
b P values (by Mann-Whitney test, 2-tailed) are in boldface where P < .05.