title: Letter: False-positive acid-fast smears.
mesh_terms: D001576:Benzophenoneidum; D003951:Diagnostic Errors; D006801:Humans; D009169:Mycobacterium tuberculosis / Q000302:isolation & purification*; D013183:Sputum / Q000382:microbiology; D013194:Staining and Labeling
chemical_list: D001576:Benzophenoneidum