Hydroethanolic Extracts of Haplopappus baylahuen Remy and Aloysia citriodora Palau Have Bactericide Activity and Inhibit the Ability of Salmonella Enteritidis to Form Biofilm and Adhere to Human Intestinal Cells

Figure 2

Biofilm quantification. Crystal violet assay in 96-well plates with Salmonella Enteritidis incubated with vehicle (control) or 1 or 2 mg/ml of bailahuen or cedron extract. After 24 hours of incubation, the biofilms were fixed with methanol and dyed with violet crystal. The absorbance was then measured at 550 nm. The data are shown as percentage of control (; ). The values indicate significant difference, . Note that the two extracts decrease biofilms, although cedron was more effective.