Antibiofilm Activity of Extract and a Compound Isolated from Triumfetta welwitschii against Pseudomonas aeruginosa

Figure 4

The effects of the extract and B1 on biofilm formation in P. aeruginosa. The control contained tryptic soy broth without cells. The error bars indicate the standard deviation from the mean (n = 4). The asterisks () indicate statistically significant differences compared to the positive control (unexposed P. aeruginosa), which represented cells without any extract, where denotes . At 100 μg/ml, the extract and B1 resulted in only 38% and 6% formation of biofilm in microplates by P. aeruginosa, respectively.