Figure 4.
Biofilm formation by the nasal carrier strain of Staphylococcus aureus is inhibited by interleukin-1α (IL-1α). A reduction in the biofilm formation of the nasal carrier strain was observed by the preincubation with various concentrations of IL-1α compared with a control. The figures represent a triplicate of experiments where an initial biofilm inoculum of a total number of bacteria at (a) 2 × 106 colony-forming units (CFU), (b) 2 × 105 CFU and (c) 2 × 104 CFU. The panels to the right of each graph are representative treated and control wells. Biofilm concentration was quantified by staining with crystal violet and measuring the absorbance at 620 nm.