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Updated: Aug 19, 2026

Quality-Controlled Sputum Analysis by Flow Cytometry
Published on: August 9, 2021
Lot quality assurance sampling of sputum acid-fast bacillus smears for assessing sputum smear microscopy centers
N Selvakumar1, B N Murthy, E Prabhakaran
1Tuberculosis Research Center (Indian Council of Medical Research), Mayor V. R. Ramanathan Rd., Chetput, Chennai 600 031, India. selvakumarn@hotmail.com
Abstract:
Assessment of 12 microscopy centers in a tuberculosis unit by blinded checking of eight sputum smears selected by using a lot quality assurance sampling (LQAS) method and by unblinded checking of all positive and five negative slides, among the slides examined in a month in a microscopy centre, revealed that the LQAS method can be implemented in the field to monitor the performance of acid-fast bacillus microscopy centers in national tuberculosis control programs.
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