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.