Table 3: List of antibiotics and diameter of zone inhibition standard [30].

Antibiotic Name Disc
Concentration (μg) 		Diameter of Zone of Inhibition
Resistant
<or = nm 		Intermediate
nm 		Susceptible
= or>nm
1. Erythromycin 15 ≤13 14-22 ≥23
2. Penicillin 10 ≤19 20-27 ≥28
3. Vancomycin 30 ≤14 15-16 ≥17
4. Trimethoprim-
sulfamethoxazole		 25 ≤10 11-15 ≥16
5. Gentamicin 10 ≤12 13-14 ≥15
6. Oxacillin 1 ≤10 11-12 ≥13
7. Tetracycline 30 ≤14 15-18 ≥19
8. Chloramphenicol 30 ≤12 13-17 ≥18
9. Moxifloxacin 5 ≤20 21-23 ≥24
10. Norfloxacin 10 ≤12 13-16 ≥17
11. Nitrofurantoin 30 ≤14 15-16 ≥17
12. Ciprofloxacin 5 ≤15 16-20 ≥21
13. Rifampin 5 ≤16 17-19 ≥20
14. Doxycycline 30 ≤12 13-15 ≥16
15. Cefixime 5 ≤15 16-18 ≥19
16. Minocycline 30 ≤14 15-18 ≥19
17. Levofloxacin 5 ≤15 16-18 ≥19
18. Clindamycin 2 ≤14 15-20 ≥21