Table 1.
Distribution of Organisms for ER-GNR and ACR-GNR Cultures (P < .001 for X 2 Test)
| Genus | ER-GNR | ACR-GNR |
|---|---|---|
| Acinetobacter | n/a | 20.1% |
| Enterobacter | 28.4% | 2.1% |
| Escherichia | 14.8% | 1.7% |
| Klebsiella | 40.5% | 17.3% |
| Pseudomonas | n/a | 54.4% |
| Other | 21.7% | 20.1% |
Acinetobacter and Pseudomonas express intrinsic resistance to ertapenem and were not included in the ER-GNR data set.
Abbreviations: ACR-GNR, antipseudomonal (nonertapenem) carbapenem-resistant Gram-negative rods; ER-GNR, ertapenem-resistant Gram-negative rods.