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SETTING Jiangxi, China. OBJECTIVE To evaluate the performance of the direct nitrate reductase assay (D-NRA) for rapid, low-cost detection of multidrug-resistant (MDR-) and extensively drug-resistant tuberculosis (XDR-TB) in high-burden, resource-limited settings. METHODS A total of 225 smear-positive sputum samples were collected from consecutive(More)
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