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4/12/2012 · Clinical evaluation for TB disease included giving two sputum samples; one collected on spot under supervision (spot sample) on day one and another on day 2 by the participant without supervision (EM sample). Sputum samples were obtained daily from the participants by nurses and transported in cold boxes (temperature ≤ 8°C) to a reference Sputum sample for tb Nelson A sputum stain for Mycobacteria is a laboratory test performed on a sample of your sputum, or phlegm. It’s also known as an acid-fast bacillus (AFB) stain or a tuberculosis (TB) smear. A doctor
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