Fig 7. Effect of indole on colonization resistance in HeLa epithelial cells.

HeLa cells were seeded in a 24 well plate and conditioned with 1 mM indole for 24 h prior to infection. A MOI of 10:1 was used for infection. Data shown are intracellular bacteria recovered from infected HeLa monolayers with indole treatment or control (solvent treatment). * denotes statistical significance relative to the solvent control at p < 0.05 using the Student’s t-test. Column bars depict mean (n = 3) and error bars represent SD.