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Projected impact of nucleic acid amplification test (NAAT) on reducing duration of airborne isolation and duration of unnecessary Mycobacterium tuberculosis (MTB) treatment for patients with nontuberculous mycobacteria (NTM). 1 denotes that actual time of discontinuing airborne isolation and stopping MTB treatment. 2 denotes the expected time discontinuing airborne isolation and stopping MTB treatment, if NAAT was not available. AFB, acid-fast bacilli.
