| Organism (R pattern) | % Inhibited at CLSI Breakpoints |
||
|---|---|---|---|
| 1997–1999 | 2000–2002 | 2004–2006 | |
| S. aureus (SA; 2,456) | |||
| Methicillin-R (MRSA) | 37.3 | 39.6 | 38.3 |
| P. aeruginosa (PSA; 2,377) | |||
| IPM-NSa | 23.6 | 25.1 | 29.3 |
| CAZ-R | 15.2 | 21.1 | 19.3 |
| LEV-R | 21.2 | 25.1 | 28.6 |
| AMK-R | 8.7 | 8.2 | 7.5 |
| Klebsiella spp. (KSP; 956) | |||
| IPM-NSa | 0.0 | 0.0 | 0.4 |
| CAZ-R | 10.2 (13.6)b | 12.4 (19.4)b | 17.0 (27.1)b |
| LEV-R | 2.4 | 2.3 | 12.6 |
| AMK-R | 1.0 | 2.6 | 5.4 |
| E. coli (EC; 847) | |||
| CAZ-R | 1.7 (6.8) | 3.1 (8.2) | 3.6 (9.7) |
| LEV-R | 4.0 | 7.4 | 17.9 |
| Enterobacter spp. (ESP; 748) | |||
| IPM-NSa | 0.5 | 0.3 | 1.1 |
| CAZ-R | 21.9 | 24.5 | 30.7 |
| LEV-R | 7.1 | 7.8 | 17.0 |
| Acinetobacter (ASP; 568) | |||
| IMP-NSa | 33.3 | 20.9 | 47.5 |
| CAZ-R | 37.9 | 59.6 | 69.1 |
| LEV-R | 45.2 | 51.7 | 68.3 |
| AMK-R | 45.9 | 53.1 | 62.2 |
a
NS, non-susceptible
b
Number in parentheses reflects the ESBL-phenotype rate (MIC values ≥2 mg/L).