Fig. 1
From: Yield of household contact tracing for tuberculosis in rural South Africa
Index client recruitment is illustrated in Panel A, and household member recruitment in Panel B. ** Index participants were ineligible due to age < 18 years (N = 1), a time between TB treatment initiation and study screening of > 30 days (N = 5), having no household contacts (N = 22), or primary residence outside of the study district (N = 9). † NHNS: Number of (index case) households needed to screen occupants with smear and culture to find 1 new case of active TB among household contacts