The AFB ×3 (Acid-Fast Bacilli Microscopy) test at Pamel Laboratories is a specialized diagnostic test used to detect Mycobacterium tuberculosis, the bacteria that causes tuberculosis (TB). This test involves examining three sputum samples collected over consecutive days or at specified intervals to increase detection accuracy, especially in patients showing signs of pulmonary TB.
This test is crucial for early diagnosis, isolation, and treatment to help control the spread of tuberculosis.
What the Test Includes:
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Microscopic examination of three sputum samples using Ziehl-Neelsen staining or fluorescent staining
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Detection of acid-fast bacilli (AFB) — a characteristic of TB bacteria
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Results reported as AFB positive or AFB negative, with bacterial load if present
Purpose of the Test:
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Diagnose pulmonary tuberculosis
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Screen patients with chronic cough, weight loss, night sweats, chest pain, or hemoptysis (coughing blood)
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Monitor response to TB treatment
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Identify TB in HIV-positive or immunocompromised individuals
Sample Type: Three early morning deep-cough sputum samples collected over 1–3 days
Turnaround Time: 24–48 hours
Collection Instructions:
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Collect each sample first thing in the morning before eating
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Rinse mouth with clean water before coughing up sputum
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Avoid saliva — deep lung sample is required
