Table 2. Determination of the diameter of the ZOI of Staphylococcus aureus isolated from cow milk.
| S. No. | Antibiotics | Abbreviations | Disc Conc. | Diameter of Zone of inhibition (ZOI) in mm | ||
|---|---|---|---|---|---|---|
| Resistant | Intermediate | Susceptible | ||||
| 1. | Penicillin | P | 10IU | ≤ 20a | 21–28a | ≥ 29a |
| 2. | Oxytetracycline | OT | 30 µg | ≤ 14e | 15–18d | ≥19e |
| 3. | Chloramphenicol | C | 30 µg | ≤ 12f | 13–17e | ≥ 18f |
| 4. | Gentamycin | CN | 10 µg | ≤ 12f | 13–14f | ≥ 15h |
| 5. | Bacitracin | B | 10U | ≤ 8i | 9–11j | ≥ 13j |
| 6. | Ampicillin | AM | 10 mcg | ≤ 11g | 12–13h | ≥ 14i |
| 7. | Streptomycin | S | 10 µg | ≤ 11g | 12–14g | ≥ 15h |
| 8. | Amoxicillin | AX | 25 mcg | ≤ 19b | NIL | ≥ 20d |
| 9. | Carbenicillin | CAR | 100 µg | ≤ 17c | 18–22b | ≥ 23b |
| 10. | Ciprofloxacin | CIP | 5 µg | ≤ 15d | 16–20c | ≥ 21c |
| 11. | Trimethoprim-Sulphamethoxazole | SXT | 25 µg | ≤ 10h | 11–15i | ≥ 16g |
| 12. | Cefotaxime | CTX | 30 µg | ≤ 14e | 15–17d | ≥ 18f |
Note: Superscript shows the highest and lowest ZOI values.