Isolates Zone of inhibition at different concentrations
10% 5% 2.5% 1.25% 0.625%
1 21 19 17 16 13
2 20 18 16 15 13
3 19 18 15 14 12
4 22 19 16 16 14
Mean 20.5 18.5 16 15.25 13
Table 3: Zone of inhibition (mm) exhibited by ethanol extract of leaf of Xanthium strumarium against Staphylococcus aureus.