Table 2.
Weighted Antibiotic Resistance and Susceptibility Rates for Gram-Negative Bacteria in VA NHs and VAMCs
| Gram-Negative Organisms |
% MDR | % Carbapenem Resistance |
Percentage Susceptible |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ampicillin- Sulbactam |
Cefazolin | Cefepime | Ceftriaxone | Ciprofloxacin | Imipenem | Nitrofurantoin | Piperacillin- Tazobactam |
Trimethoprim- Sulfamethoxazole |
|||
| Escherichia coli | |||||||||||
| NH | 8.4 | 1.2 | 46 | 66 | 89 | 80 | 53 | 100 | 94 | 92 | 67 |
| VAMC | 6.7 | 0.4 | 52 | 73 | 92 | 84 | 65 | 100 | 96 | 95 | 71 |
| Difference in % | 1.7 | 0.8 | −6* | −7* | −3 | −4 | −12* | 0 | −2 | −3* | −4 |
| Klebsiella spp | |||||||||||
| NH | 8.8 | 1.9 | 69 | 74 | 92 | 84 | 86 | 98 | 40 | 90 | 82 |
| VAMC | 5.2 | 1.1 | 73 | 76 | 92 | 86 | 90 | 98 | 47 | 91 | 86 |
| Difference in % | 3.6 | 0.8 | −4 | −2 | 0 | −2 | −4* | 0 | −7* | −1 | −4 |
| Proteus mirabilis | |||||||||||
| NH | 4.5 | 19.0 | 83 | 68 | 97 | 92 | 39 | 40 | – | 99 | 58 |
| VAMC | 5.1 | 18.6 | 83 | 65 | 96 | 90 | 59 | 35 | – | 99 | 66 |
| Difference in % | −0.6 | 0.4 | 0 | 3 | 1 | 2 | −20* | 5 | – | 0 | −8* |
| Pseudomonas aeruginosa | |||||||||||
| NH | 12.3 | 15.2 | – | – | 87 | – | 73 | 82 | – | 85 | – |
| VAMC | 9.1 | 13.4 | – | – | 89 | – | 80 | 83 | – | 88 | – |
| Difference in % | 3.2 | 1.8 | – | – | −2 | – | −7* | −1 | – | −3 | – |
MDR, multidrug resistant.
The percentage of MDR and carbapenem-resistant isolates are indicated in the corresponding columns. Otherwise, the columns indicate percentage susceptibility.
*
Statistically significant difference using Bonferroni correction for multiple comparisons.