Concentration (μg/mL) S.   aureus E.  coli B. subtilis P. aeruginosa AMOXICILLIN 5000 30.83 ± 0.34 27.00 ± 0.0 24.83 ± 0.14 24.50 ± 0.89 2500 27.17 ± 0.14 24.67 ± 0.28 24.00 ± 0.31 21.67 ± 0.18 1250 25.67 ± 0.18 21.67 ± 0.47 21.33 ± 0.18 20.00 ± 0.0 625 0.0 0.0 0.0 0.0 FLUCLOXACILLIN 10000 35.17 ± 0.14 26.33 ± 0.28 38.00 ± 0.31 29.67 ± 0.36 5000 31.50 ± 0.89 20.00 ± 0.22 35.17 ± 0.14 24.33 ± 0.18 2500 29.67 ± 0.18 20.33 ± 0.18 32.83 ± 0.14 22.67 ± 0.36 1250 0.0 0.0 0.0 0.0 CLOXACILLIN 10000 30.00 ± 0.22 23.67 ± 0.34 25.50 ± 0.68 26.00 ± 0.22 5000 28.00 ± 0.26 18.00 ± 0.53 24.33 ± 0.18 28.33 ± 0.28 2500 25.67 ± 0.28 19.67 ± 0.36 23.33 ± 0.18 25.67 ± 0.36 1250 0.0 0.0 0.0 0.0 SEM = Standard error mean, diameter of well: 10 mm

Table 5: Antibacterial activity (mean zones of inhibition ± SEM) of reference antibiotic samples.