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. 2017 Mar 22;4(3):170025. doi: 10.1098/rsos.170025

Figure 2.

Figure 2.

Biofilm inhibition assay. (a) A, P. aeruginosa biofilm (positive control); B, M63 broth (negative control); C, D and E, biofilm treated with 5% supernatant, 5% aqueous extract and 0.5% organic extract of QSI, respectively. (b) Biofilm production of P. aeruginosa cell culture (50 µl) in the presence of QSI supernatant (1%, 3%, 5%), aqueous extract (5%), organic extract (0.5%), furanone (10 µM), QSI culture (50 µl) and methanol (0.5%). Asterisks indicate a statistically significant difference (**p < 0.01) between experimental groups and control (P. aeruginosa culture).