2.4.3. Preparation of bacterial inoculum
A twenty-four hour nutrient broth culture of tested bacteria
was grown in an orbital shaking incubator, centrifuged,
washed twice with PBS and then standardized to approximately
106 CFU ml1 using broth medium.
2.4.4. Bacterial sensitivity test
Standard well agar diffusion method was carried out to detect
the activity of Ag-Nps against the clinical bacterial isolates
according to Cheesbrough (2000). For antibacterial activities
of the compounds, wells were made in plates containing nutrient
agar medium seeded with 100 ll of 24 h of each clinical isolate.
From each solution (1–5), that contains both Ag and olive
leaves extracts (OLE), as well as the control, 100 ll was placed
in separate wells. The plates were left in refrigerator for 2 h
then, incubated at 37 C for 24 h. The diameter of inhibition
zones was measured and tabulated.