Table 7.
Minimum Inhibitory Concentration (MIC) 50 and MIC 90 results for the studied E. coli isolates.
| Group | Isolates | Antibiotics | MIC50 | MIC90 | Epidemiological Cut-Off Value |
|---|---|---|---|---|---|
| Control | 12 | Ciprofloxacin | 2 | >8 | >0.064 |
| Nalidixic acid | >128 | >128 | >16 | ||
| Ceftazidime | ≤0.5 | >8 | >0.5 | ||
| Colistin | 1 | 8 | >2 | ||
| Ampicillin | >64 | >64 | >8 | ||
| Gentamicin | 8 | >32 | >2 | ||
| Tetracycline | 16 | >64 | >8 | ||
| ZnO | 12 | Ciprofloxacin | 0.06 | 2 | >0.064 |
| Nalidixic acid | 64 | >128 | >16 | ||
| Ceftazidime | ≤0.5 | >8 | >0.5 | ||
| Colistin | 2 | >16 | >2 | ||
| Ampicillin | >64 | >64 | >8 | ||
| Gentamicin | 8 | >32 | >2 | ||
| Tetracycline | 64 | 64 | >8 | ||
| OEO 1.2% | 18 | Ciprofloxacin | 0.12 | 1 | >0.064 |
| Nalidixic acid | 64 | >128 | >16 | ||
| Ceftazidime | 1 | 8 | >0.5 | ||
| Colistin | ≤1 | ≤1 | >2 | ||
| Ampicillin | >64 | >64 | >8 | ||
| Gentamicin | 4 | 4 | >2 | ||
| Tetracycline | ≤2 | >64 | >8 | ||
| PGP 2% | 21 | Ciprofloxacin | 2 | >8 | >0.064 |
| Nalidixic acid | >128 | >128 | >16 | ||
| Ceftazidime | 0.5 | >8 | >0.5 | ||
| Colistin | 1 | >16 | >2 | ||
| Ampicillin | >64 | >64 | >8 | ||
| Gentamicin | >32 | >32 | >2 | ||
| Tetracycline | 64 | >64 | >8 | ||
| OEO 1.2% + PGP 2% | 18 | Ciprofloxacin | 4 | >8 | >0.064 |
| Nalidixic acid | >128 | >128 | >16 | ||
| Ceftazidime | ≤5 | >8 | >0.5 | ||
| Colistin | ≤1 | 2 | >2 | ||
| Ampicillin | >64 | >64 | >8 | ||
| Gentamicin | 4 | >32 | >2 | ||
| Tetracycline | 64 | >64 | >8 |
The number of isolates studied for each antibiotic was 81.