HIGHLIGHTS
SUMMARY
Active case-finding for undiagnosed TB disease (ACF), using approaches such as door-to-door enquiry for chronic cough, can rapidly reduce undiagnosed TB prevalence, but is limited to very high prevalence populations by the cost and performance of currently available TB diagnostics. Data from TB prevalence surveys can provide detailed neighbourhood-level data on TB determinants and undiagnosed TB burden to guide National TB Programmes and District Health Officers, allowing neighbourhoods with delayed detection and incomplete detection of TB to be identified through high prevalence-to-notification (P:N) ratios. Calculation of empirical . . .
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