Table 1.
Comparison of polymyxin B susceptibility of adapted DOT-MGA from colonies grown on agar plates with BMD.
| Microorganism | Isolates (n) | Polymyxin susceptible (BMD/adapted DOT-MGA) | Polymyxin resistant (BMD/adapted DOT-MGA) | Categorical agreement |
|---|---|---|---|---|
| Enterobacterales | ||||
| Klebsiella pneumoniae | 63 | 34/35 | 29/28 | 98.4% |
| Enterobacter sp. | 7 | 5/6 | 2/1 | 85.7% |
| Escherichia coli | 12 | 9/6 | 3/6 | 75.0% |
| Klebsiella aerogenes | 1 | 0/0 | 1/1 | 100% |
| Klebsiella oxytoca | 1 | 1/1 | 0/0 | 100% |
| Citrobacter freundii | 1 | 0/0 | 1/1 | 100% |
| Serratia marcescens | 8 | 0/0 | 8/8 | 100% |
| Non-fermenters | ||||
| Pseudomonas aeruginosa | 18 | 18/18 | 0/0 | 100% |
| Pseudomonas fluorescens | 2 | 1/1 | 1/1 | 100% |
| Acinetobacter calcoaceticus-baumannii complex | 9 | 4/3 | 5/6 | 88.9% |
| Total | 122 | 72 | 50 | 95% |