Antivirulence activity of PG-AuNPs and PG-ZnONPs towards P. aeruginosa. (A) Effect of PG-AuNPs and PG-ZnONPs on hemolytic activity, (B) effect of PG-ZnONPs on pyoverdine production (note: we were unable to determine pyoverdine production in the presence of PG-AuNPs due to its dark-brown color, which obscures the yellow–green color of pyoverdine produced in the colorless MSM), (C) effect of PG-AuNPs on pyocyanin production, (D) effect of PG-ZnONPs on pyocyanin production, (E) effect of PG-AuNPs on rhamnolipid production, and (F) effect of PG-ZnONPs on rhamnolipid production. *** and ** denote significance at p < 0.0001 and p < 0.01, whereas ns denotes non-significance.