TABLE 4.
Relationship between number of antipseudomonal antibiotic exposures and MDR P. aeruginosa (n = 351)a
| No. of antibiotic exposuresb | MDR P. aeruginosa (n = 122) | No MDR P. aeruginosa (n = 229) | % MDR P. aeruginosa (n = 351) |
|---|---|---|---|
| 0 | 34 (27.9) | 122 (53.3) | 21.8 |
| 1 | 39 (32.0) | 74 (32.3) | 34.5 |
| 2 | 28 (23.0) | 29 (12.1) | 49.1 |
| 3 | 16 (13.1) | 3 (1.3) | 84.2 |
| 4 | 3 (2.5) | 1 (0.4) | 75 |
| 5 | 2 (1.6) | 0 (0) | 100 |
a
All data are presented as number (percentage) unless otherwise indicated.
b
Note that carbapenem exposure for ≥3 days, fluoroquinolone exposure for ≥4 days, aminoglycoside exposure for ≥5 days, cefepime exposure for ≥9 days, and piperacillin-tazobactam exposure for ≥12 days were defined as antibiotic exposures prior to culture collection.