FIG. 1.

Effect of H. ducreyi on T-cell proliferation. (A) Cells from a non-antigen-specific line derived from a biopsy sample were cultured with varying concentrations of H. ducreyi FTWC in the presence of autologous PBMCs and IL-2 for 96 h. (B) PBMCs were stimulated with 1 μg of PHA per ml in the presence of varying concentrations of H. ducreyi FTWC. The results are expressed as the means ± standard deviations of [³H]thymidine incorporation from triplicate wells and are representative of experiments done on cell lines or PBMCs obtained from five donors.