| Target organism | Inhibition zone diameter (mm) |
| Enterococcus faecalis ATCC 10541 | 12 |
| Staph. aureus ATCC 25923 | 12 |
| Klebsiella pneumoniae ATCC 10031 | 9 |
| Proteus vulgaris ATCC 6380 | 11 |
| Salmonella typhi ATCC 1319106 | 0 |
| E. coli ATCC 25922 | 10 |
| E. coli (local isolate) | 0 |
| Pseudomonas aeruginosa ATCC 27853 | 0 |