FIGURE 1.

Antagonistic activity of vaginal lactobacilli cells against Chlamydia trachomatis infectivity in exclusion assays. Exclusion experiments were performed at the dose of 5 × 10⁷ lactobacilli cells in HeLa cells. Streptococcus agalactiae, Enterococcus faecalis, and Bacillus subtilis were used as reference Gram-positive bacteria. C. trachomatis infectivity was evaluated as number of IFUs/microscopic field. Results were expressed in percentage compared with control, taken as 100% (black bar). Bars represent median values, error bars represent median absolute deviations. Statistical significance was calculated vs. control. ^∗P ≤ 0.01.