TABLE 1.
Distribution of carbapenem MICs in a representative sample of multidrug-resistant isolates from the DoD health system (one isolate per patient per year)
| Organism (no. of strains) | No. of strains associated with the following carbapenem MICs |
% Intermediate or resistant | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.5 | ≤1 | 1 | 2 | 4 | >4 | 8 | >8 | Total | ||
| Acinetobacter spp. (2,205) | ||||||||||
| Ertapenem | 1 | 1 | 8 | 10 | ||||||
| Imipenem | 646 | 312 | 62 | 50 | 1,135 | 2,205 | 56.55 | |||
| Enterobacter spp. (674) | ||||||||||
| Ertapenem | 543 | 39 | 36 | 23 | 33 | 674 | ||||
| Imipenem | 470 | 135 | 52 | 7 | 10 | 674 | 30.27 | |||
| Escherichia coli (4,831) | ||||||||||
| Ertapenem | 4,754 | 11 | 14 | 10 | 42 | 4,831 | ||||
| Imipenem | 4,757 | 27 | 14 | 11 | 21 | 4,830 | 1.51 | |||
| Klebsiella spp. (1,222) | ||||||||||
| Ertapenem | 982 | 13 | 32 | 22 | 173 | 1,222 | ||||
| Imipenem | 1,034 | 21 | 27 | 27 | 113 | 1,222 | 15.38 | |||
| Pseudomonas spp. (1,433) | ||||||||||
| Ertapenem | 1 | 1 | 7 | 9 | ||||||
| Imipenem | 158 | 246 | 102 | 110 | 817 | 1,433 | 64.69 | |||