Test pathogen Concentration of compound (μg/disc) Compound (cemb) Standard drug
Streptomycin sulphate Chloramphenicol
Salmonella typhi 10 - 2.0 2.4
20 - 2.2 2.5
40 - 2.4 2.6
60 0.9 2.8 2.9
80 1.2 3.1 3.2
100 1.3 3.5 3.7
Shigella flexneri 10 0.6 2.0 2.6
20 0.8 2.4 2.9
40 0.9 2.6 3.0
60 1.1 3.0 3.3
80 1.3 3.3 3.5
100 1.5 3.6 3.7
Staphylococcus aureus 10 1.8 2.0 2.2
20 2.0 2.1 2.4
40 2.4 2.3 2.5
60 2.7 2.6 2.8
80 2.8 2.9 3.2
100 3.5 3.6 3.8
Enterococcus faecalis 10 - 2.2 1.6
20 - 2.3 1.9
40 - 2.5 2.0
60 0.7 2.6 2.1
80 0.9 3.0 2.3
100 1.2 3.2 2.5
No zone was observed *inhibition zone is the average of the diameter of zone from two sides in cm. (A. Hydrophila, E. coli does not show activity).
Table 6: Antibacterial assay of the cemb and standard drugs against human bacterial pathogens.