| Compound No. | Zone of inhibition (mm) at 200 µg dw/disc | |||||
| Gram + Ve bacteria | Gram − Ve bacteria | |||||
| B. cereus | B. megaterium | S. aureus | E. coli | S. typhi | S. paratyphi | |
| 2 | NF | NF | NF | NF | NF | NF |
| 3 | NF | NF | NF | NF | NF | NF |
| 4 | 5.4 | NF | 7 | NF | 8 | 7 |
| 5 | 4.5 | 6 | 6 | *10 | *13 | *12 |
| 6 | NF | 5 | 6 | NF | *10 | 9 |
| 7 | NF | NF | *14 | NF | NF | NF |
| 8 | *10 | 5.5 | *12 | 8 | 6 | 7 |
| 9 | NF | *11 | 5 | 6 | NF | 8 |
| 10 | *12 | *10 | 4 | NF | 5.5 | NF |
| 11 | NF | NF | NF | NF | NF | NF |
| 12 | 8 | NF | NF | NF | 4 | 5 |
| 13 | NF | NF | NF | NF | NF | NF |
| 14 | 7 | NF | NF | NF | NF | NF |
| **Ampicillin | *14 | *12 | *19 | *16 | *20 | *18 |