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HoS and glucose increase biofilm formation and OFLX tolerance in P. aeruginosa PA47. (a) Biofilms in the presence/absence of glucose/HoS were treated with OFLX and stained with SYTO9 and propidium iodide was observed by CLSM. Scale bar, 20 μm. (b) The coverage ratio of the total biofilm biomass of three independent experiments was analyzed by ImageJ. *p < .05, compared with the untreated control group
