Figure 6: Effect of subinhibitory phage concentration on biofilm formation of strain S. aureus IPLA 15.

(A) Adhered biomass of S. aureus IPLA 15 in the presence of different MOIs of phage phiIPLA-RODI after 24 hours of incubation at 37 °C determined by crystal violet staining and shown as percentage of the untreated control. Data correspond to the average and standard deviation of four independent biological replicates. The values obtained for each phage concentration were compared to the control grown without phage and P-values < 0.05 (*) were considered significant. (B) Photograph showing the crystal violet-stained biofilm formed by IPLA 15 in the absence (left) or presence (right) of phiIPLA-RODI at an MOI of 10−2.