An Evaluation of the Antibacterial Properties of Tormentic Acid Congener and Extracts From Callistemon viminalis on Selected ESKAPE Pathogens and Effects on Biofilm Formation

Figure 8

The effect of C. viminalis EtOH:H₂O extract, DCM:MeOH extract, tormentic acid congener, and ciprofloxacin on biofilm polysaccharide content. P. aeruginosa (a) and S. aureus (b) were incubated in a medium containing 0.80 µg/ml ciprofloxacin and 12.5 µg/ml of extracts and tormentic acid congener for 16 hours. Mannose was used as the standard for carbohydrate content. Carbohydrate content was read at 492 nm using a Stat Fax model microplate reader. ANOVA was carried out using GraphPad Prism6 and Dunnett’s multiple comparisons test with a summary of ^∗∗∗∗P value < 0.0001.

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