TABLE 2.
Isolated microorganisms in patients with bloodstream infections due to Gram-negative bacilli by treatment group
| Organism or infectiona | No. (%) in study population |
Pb | ||
|---|---|---|---|---|
| Total (n = 542) | Combination therapy (n = 304) |
Monotherapy (n = 238) |
||
| Escherichia coli | 273 (50.4) | 147 (48.4) | 126 (52.9) | 0.33 |
| Pseudomonas aeruginosa | 104 (19.2) | 76 (25) | 28 (11.8) | <0.001 |
| Klebsiella pneumoniae | 98 (18.1) | 52 (17.1) | 46 (19.3) | 0.58 |
| Enterobacter cloacae | 26 (4.8) | 12 (3.95) | 14 (5.88) | 0.4 |
| Other | 41 (7.6) | 17 (5.6) | 24 (10) | 0.072 |
| MDR BSIc | 146 (27.7) | 83 (28.2) | 63 (27) | 0.95 |
| E. coli | 78 (14.8) | 40 (13.6) | 38 (16.3) | 0.25 |
| K. pneumoniae | 29 (5.5) | 13 (4.4) | 16 (6.7) | 0.26 |
| P. aeruginosa | 29 (5.5) | 25 (8.5) | 4 (1.7) | 0.001 |
| Other | 10 (1.9) | 5 (1.7) | 5 (2.1) | 0.7 |
a
Abbreviations: BSI, bloodstream infection; MDR, multidrug resistant.
b
Qualitative data were tested by the chi-square test.
c
Percentages are calculated based on the available data regarding MDR BSI (total study population, n = 527; monotherapy population, n = 233; combination therapy population, n = 294).