TABLE 3.
Antibiotic susceptibility (% susceptible) of Gram-negative organisms isolated from blood culture
| Organism (no. tested)a | % susceptible to:b |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Amikacin | Ampicillin | Ampicillin/sulbactam | Cefepime | Ceftazidime | Ceftriaxone | Ciprofloxacin | Gentamicin | Meropenem | Piperacillin/tazobactam | SXT | |
| Acinetobacter species (6) | 100 | 17 | 33 | 83 | 17 | - | 100 | 100 | 100 | 17 | 100 |
| Citrobacter species (6) | 100 | - | - | 100 | 17 | 17 | 100 | 83 | 100 | 0 | 83 |
| Enterobacter cloacae complex (21) | 100 | - | - | 90 | - | - | 100 | 95 | 100 | 0 | 95 |
| Escherichia coli (46) | 100 | 35 | 46 | 78 | 85 | 70 | 70 | 80 | 100 | 93 | 54 |
| Klebsiella species (57) | 100 | - | 58 | 88 | 79 | 77 | 81 | 96 | 95 | 86 | 74 |
| Pseudomonas aeruginosa (17) | 100 | - | - | 88 | 76 | - | 88 | 94 | 71 | 65 | - |
| Salmonella species (11) | - | 64 | - | - | - | 82 | - | - | - | - | 82 |
| Serratia marcescens (16) | 100 | - | - | 100 | - | - | 94 | 100 | 100 | - | 100 |
a
Definitive antibiotic susceptibility among Gram-negative organisms isolated from blood cultures included in initial cohort. Organisms excluded due to low numbers include Escherichia vulneris (n = 1), Pantoea species (n = 1), Proteus mirabilis (n = 2), Pseudomonas fluorescens group (n = 1), and Serratia liquefaciens (n = 1).
b
SXT, trimethoprim-sulfamethoxazole; the symbol “-” indicates not tested.