FIG. 4.

Semiquantitative culture for M. ulcerans. Samples were cultured from 120 lesions before treatment with RS for 8 weeks and from 64 selected cases responding poorly at 4, 6, 8, or 12 weeks. Negative cultures at each time point are shown as a single point on the baseline. Each line joins the data for samples taken from the same patient, and dotted lines highlight the results for six patients who had positive cultures at two different time points.