Diagnostic performance of sputum nucleic acid amplification testing for TB diagnosis among smear-negative TB suspects in sub-Saharan Africa.

Abbreviations: IS, insertion sequence; PCR, polymerase chain reaction.Legend: Studies with 30 or more smear-negative patients from sub-Saharan Africa were included.*Estimated from population-specific HIV prevalence rather than directly measured;†Also includes specimens from Azerbaijan, India, and Peru;‡Sensitivity based on 3 PCR specimens.