While doing AST for Pseudomonas aeruginosa, after incubation, no zone of inhibition observed in the plate near the well. wells surrounded by bacterial growth, when the same plate observed under UV light, large zone of clearance was recorded. If, zone is showing absence of pyocin pigment production, how to interpret this result? whether take it as inhibited or not inhibited?
Not sure why you ask. Observed no inhibition of growth - so there is no inhibition of growth. That UV fluorescence is inhibited may well mean inhibition of pyocyanin synthesis but there is still no inhibition of growth.
btw - you should read the literature. Pyocyanin production is known to be inhibited by ZnO NP. Article ZnO Nanoparticles Inhibit Pseudomonas aeruginosa Biofilm For...