Table 3 Inhibition zone (mm) showing antibacterial activities of volatile oils and ciprofloxacin against bacterial test organisms
Microorganism | Positive control | Zone of inhibition of volatile oils and standard drug | |||||||
|---|---|---|---|---|---|---|---|---|---|
Concentration | Ciprofloxacin (mgmL-1) | Leaves volatile oil (mgmL-1) | Flowers volatile oil (mgmL-1) | ||||||
0.4 | 0.1 | 0.025 | 0.4 | 0.1 | 0.025 | 0.4 | 0.1 | 0.025 | |
Gram negative Bacteria | |||||||||
  Aeromonas hydrophilia ACC | 34.0 ± 0.6 | 26.0 ± 2.0 | 20.0 ± 0.5 | 58.0 ± 0.3 | 44.0 ± 4.0 | 19.0 ± 0.6 | 52.0 ± 1.0 | 41.0 ± 1.0 | 15.0 ± 0.8 |
  Escherichia coli ATCC 35150 | 38.0 ± 4.0 | 32.0 ± 4.0 | 24.0 ± 0.9 | 27.0 ± 3.0 | 18.0 ± 3.0 | 13.0 ± 3.0 | 20.0 ± 4.0 | 12.0 ± 4.0 | 10.0 ± 3.0 |
  Vibro alginolyticus DSM 2171 | 33.0 ± 2.0 | 29.0 ± 2.0 | 23.0 ± 0.4 | 67.0 ± 2.0 | 48.0 ± 5.0 | 28.0 ± 4.0 | 60.0 ± 5.0 | 42.0 ± 0.8 | 23.0 ± 1.0 |
  Salmonella typhi ACC | 40.0 ± 1.0 | 34.0 ± 0.6 | 28.0 ± 3.0 | 53.0 ± 0.5 | 40.0 ± l.0 | 20.0 ± 2.0 | 48.0 ± 0.5 | 35.0 ± 2.0 | 14.0 ± 0.5 |
Gram positive Bacteria | |||||||||
  Staphylococcal enteritis ACC | 40.0 ± 5.0 | 32.0 ± 1.0 | 28.0 ± 0.2 | 62.0 ± 0.5 | 45.0 ± 0.1 | 25.0 ± 0.4 | 55.0 ± 2.0 | 38.0 ± 0.9 | 22.0 ± 0.9 |
  Staphylococcus aureus ACC | 29.0 ± 2.0 | 24.0 ± 0.0 | 17.0 ± 2.0 | 54.0 ± 4.0 | 26.0 ± 1.0 | 18.0 ± 2.0 | 53.0 ± 3.0 | 24.0 ± 5.0 | 16.0 ± 2.0 |
  Listeria monocytogenes ACC | 44.0 ± 6.0 | 38.0 ± 0.2 | 32.0 ± 1.0 | 54.0 ± 2.0 | 42.0 ± 2.0 | 21.0 ± 1.0 | 50.0 ± 2.0 | 39.0 ± 3.0 | 18.0 ± 3.0 |