Fig. 1.

TB/HIV model structure. The model states depict stages in the natural history of tuberculosis; individuals in any of the tuberculosis states may also be infected with HIV. States of infectious tuberculosis are shown within the dotted box. Under PCF, only self-referring cases will be eligible for detection (light gray boxes), whereas when ICF is implemented, all sufficiently symptomatic cases can be detected (both light and dark gray boxes). Note that not all model transitions are shown here (additional details and parameter values are provided in the SI Appendix).