Table 4.
Classification of E. coli Isolates and the Control Strain ATCC 25922 Based on the Minimal Inhibitory Concentration (MIC) to Ampicillin (AMP). The BD Phoenix System Classification of Isolates as Susceptible (S) and Resistant (R) to Ampicillin (AMP), Piperacillin (PIP) and Amoxicillin-Clavulanic Acid (AMC)
| Classification | E. coli Isolates | MIC [μg/mL] on AMP | Resistance from BD Phoenix | ||
|---|---|---|---|---|---|
| AMP | PIP | AMC | |||
| Sensitive to AMP | ATCC 25922 | 7.5 | S | S | S |
| 8B1 | 3.75 | S | S | S | |
| 8B2 | 3.75 | S | S | S | |
| 8C1 | 3.75 | S | S | S | |
| 38B1 a | 3.75 | S | S | S | |
| 48C1 | 7.5 | S | S | S | |
| Resistant to AMP | 13B1 | >1000 | R | R | R |
| 60C1 | >500 | R | R | R | |
| 8C2 | 500 | R | R | S | |
| 37B1 | >500 | R | R | S | |
| 45B1 | >500 | R | R | S | |
| 63C1 | >500 | R | R | R | |
| 70C2 | >500 | R | R | R | |