Severity of disease among subjects with active TB.

<p>Subjects in each group with bilateral lesions on chest radiographs (expressed as a percentage of all subjects with active TB who had complete chest X-ray data was available at the particular time point of evaluation) are shown for helminth-infected (dark bars) and helminth-uninfected (open bars) at each assessment time point. The percentage of subjects with evidence of severe disease in the hel⁺ and hel– groups, respectively, were: 3/10 (30%) and 2/7 (29%) at baseline; 1/3 (33%) and 3/6 (50%) at 2.5-year follow-up; 1/3 (33%) and 0 at 5-year follow-up; and 1/3 (33%) and 0/1 at 7·5-year follow-up with no significant differences seen between groups overall or at each time point of evaluation.