Fig. 2.

Antibacterial activity of as-synthesized biogenic PG-AgNPs on the biofilms of L. monocytogenes. (A) Graph showing inhibitory effect of PG-AgNPs at sub-MIC values on the bacterial biofilms as detected employing crystal violet assay. Results are depicted as percent inhibition in comparison to untreated control. Data are presented as the mean ± SE of three independent experiments. (**p < 0.01; ***p < 0.001). (B) Representative images of Congo red agar plates showing zone of inhibition as a measure to establish the antibacterial potential of PG-AgNPs at sub-MIC concentrations.