TABLE 2.
Results of the Carba NP and CarbAcineto NP tests when testing Acinetobacter spp. strains that do not possess acquired carbapenemases
| Acquired β-lactamases | Acinetobacter species | No. of isolates | MIC (μg/ml) ofa: |
Carba NP test result | CarbAcineto NP test result | |
|---|---|---|---|---|---|---|
| IMP | MER | |||||
| None | ||||||
| A. baumanniib | 36 | 0.19–2 | 0.12–3 | − | − | |
| A. junii | 3 | 0.05–0.09 | 0.05–0.09 | − | − | |
| A. lwoffii | 4 | 0.09–0.19 | 0.09–0.19 | − | − | |
| A. ursingii | 2 | 0.06–0.09 | 0.06–0.09 | − | − | |
| A. johnsonii | 4 | 0.06–0.09 | 0.06–0.09 | − | − | |
| A. baumannii | 1 | 0.5 | 0.75 | NIc | − | |
| A. johnsonii | 1 | 0.09 | 0.09 | NI | − | |
| Narrow-spectrum β-lactamases | ||||||
| SCO-1 | A. baumannii | 1 | 0.38 | 0.5 | − | − |
| RTG-4 | A. baumannii | 1 | 0.38 | 0.38 | − | − |
| OXA-21 | A. baumannii | 1 | 0.75 | 0.5 | − | − |
| Extended-spectrum β-lactamases | ||||||
| SHV-5 | A. baumannii | 1 | 6 | 4 | − | − |
| PER-1 | A. baumannii | 1 | 1.5 | 1.5 | − | − |
| VEB-1 | A. baumannii | 9 | 0.38–1 | 0.5–1.5 | − | − |
| GES-12 | A. baumannii | 1 | 32 | 32 | − | − |
| Overexpressed chromosome-encoded OXA-51-like β-lactamases | ||||||
| ISAba1 + OXA-51 | A. baumannii | 2 | 2–3 | 3 | − | − |
| ISAba1 + OXA-66 | A. baumannii | 1 | 4 | 6 | − | − |
a
IMP, imipenem; MER, meropenem.
b
A. baumannii indicates A. baumannii-A. calcoaceticus complex.
c
NI, not interpretable.