Table 4.
Results of comparative study between MCD and antimicrobial susceptibility of gram negative bacteria using 323 clinical isolates.
| Gram-negative bacteria (n = 323) |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| CTRX |
CAZ |
IPM |
MEPM |
||||||
| Resistant (n = 86) | Susceptible (n = 237) | Resistant (n = 61) | Susceptible (n = 262) | Resistant (n = 6) | Susceptible (n = 317) | Resistant (n = 6) | Susceptible (n = 317) | ||
| MCD | Positive | 86 | 2 | 61 | 27 | 6 | 28 | 6 | 28 |
| Indeterminate | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | |
| Negative |
0 |
234 |
0 |
234 |
0 |
288 |
0 |
288 |
|
| sensitivity (%) | 100 | 100 | 100 | 100 | |||||
| specificity (%) | 98.7 | 89.3 | 90.9 | 90.9 | |||||
MCD: Microcolony Detection method; CTRX: ceftriaxone; CAZ: ceftazidime; IPM: imipenem; MEPM: meropenem; The MCD used chromID ESBL medium for comparison with susceptibility of third generation cephalosporin of gram-negative bacteria, and CHROMagar mSuperCARBA medium for comparison with susceptibility of carbapenem of gram-negative bacteria.