| Antibiotics | CLSI Zone Diameter Interpretive Criteria (mm) | Escherichia coli | Enterobacter aerogenes | Citrobacter freundii | Klebsiella pneumonia | Proteus mirabilis | Pseudomonas aeruginosa | Salmonella typhi | Serratia marcescens | Shigella sonnei | Staphylococcus aureus | ||
| S | I | R | |||||||||||
| Augmentin (30 μg) | ≥18 | 14 - 17 | ≤13 | R | R | R | R | R | R | R | R | R | R |
| Ceftriaxone (30 μg) | ≥23 | 20 - 22 | ≤19 | R | R | R | R | R | R | R | R | R | - |
| Nitrofuratoin (300 μg) | ≥17 | 15 - 16 | ≤14 | R | R | R | R | R | R | R | R | R | - |
| Gentamicin (10 μg) | ≥15 | 13 - 14 | ≤12 | R | R | R | S | R | R | S | R | R | R |
| Ofloxacin (10 μg) | ≥16 | 13 - 15 | ≤12 | R | S | S | R | S | R | S | S | S | - |
| Amoxicillin (30 μg) | ≥17 | 14 - 16 | ≤13 | R | R | R | R | R | R | R | R | R | - |
| Ciprofloxacin (10 μg) Salmonella spp. | ≥21 ≥31 | 16 - 20 21 - 30 | ≤15 ≤20 | R | R | R | R | S | R | R | S | R | - |
| Tetracycline (30 μg) | ≥15 | 12 - 14 | ≤11 | R | R | R | R | R | R | R | R | R | R |
| Cotrimoxazole (25 μg) | ≥16 | 11 - 15 | ≤10 | R | R | R | R | R | R | R | R | R | R |
| Chloramphenicol (30 μg) | ≥16 | 13 - 15 | ≤12 | R | I | S | R | I | R | R | R | R | R |
| Cloxacillin (5 μg) | ≥13 | 11 - 12 | ≤10 | - | - | - | - | - | - | - | - | - | R |
| Erythromycin (10 μg) | ≥23 | 14 - 22 | ≤13 | - | - | - | - | - | - | - | - | - | R |
| Streptomycin (10 μg) | ≥17 | 13 - 16 | ≤12 | - | - | - | - | - | - | - | - | - | S |