Table 2.
MIC values (μg/mL) of polymyxin B and colistin for mcr-1 positive isolates.
| No. | Strains | PMB | CST | ||||
|---|---|---|---|---|---|---|---|
| AD | rBMD* | BMAD | AD | rBMD* | BMAD | ||
| 1 | E. coli NCTC13846 | 4 | 4 | 4 | 8 | 8 | 8 |
| 2 | E. coli CCPM(A)-P-070885 | 8 | 4 | 4 | 16 | 16 | 8 |
| 3 | E. coli CCPM(A)-P-071343 | 8 | 4 | 4 | 16 | 16 | 8 |
| 4 | E. coli CCPM(A)-P-071366 | 8 | 4 | 4 | 16 | 8 | 8 |
| 5 | E. coli CCPM(A)-P-071368 | 8 | 8 | 4 | 8 | 16 | 8 |
| 6 | E. coli CCPM(A)-P-0717R14 | 8 | 4 | 4 | 8 | 8 | 8 |
| 7 | K. pneumoniae CCPM(A)-P-080920 | 16 | 8 | 8 | 32 | 16 | 32 |
No.: number; PMB: polymyxin B; CST: colistin; AD: agar dilution; rBMD: reference broth microdilution; BMAD: broth macrodilution. *: using tissue-culture-treated microtiter plates.