M. leutus E.coli S. aureus P.multocida P.aeruginosa B.subtilis S. viridans
DMSO - - - - - - -
Cifrofloxacin  28 ± 0.23 30 ± 0.10 24 ± 0.65 32 ± 0.24 - - 22 ± 0.45
ZVO 125µg/ml 23.33 ± 0.58 14.83 ± 0.41 13.33 ± 0.58 13.67 ± 0.58 11.67 ± 0.41 15.83 ± 0.78 17.67 ± 0.58
250µg/ml 25.23 ± 1.21 16.26 ± 0.85 13.78 ± 0.74 15.56 ± 1.08 12.45 ± 0.34 17.45 ±1.81 17.24 ± 2.23
500µg/ml 28.45 ± 1.87 17.89 ± 1.67 14.02 ± 1.31 16.34 ± 1.91 14.67 ± 1.01 20.45 ± 1.41 18.54 ± 1.45
Table 2: Antibacterial effect of the essential oil of the leaves of Zanthoxylum armatum.