Fig. 1.

Agar disc diffusion assay. Paper discs containing the test compound with a diameter of about 6 mm are placed on the agar surface. The inoculum is labeled as follows: DW (distilled water, placebo), myrrh solution (MS), silver nanoparticle suspension (SN), and a myrrh solution mixed with silver nanoparticle (MSN). They are incubated for 24 h, and the diameters of the zone in which growth is inhibited, called “inhibition zones” (IZs), are measured.