AFB Stain, Sputum

Description

This test is the primary method for detecting the presence of acid-fast bacilli (AFB) in sputum samples. It’s crucial for diagnosing pulmonary tuberculosis and other mycobacterial infections of the respiratory tract. The test involves staining the sputum sample and examining it under a microscope for the presence of acid-fast bacilli. While a positive result can indicate the presence of mycobacteria, including Mycobacterium tuberculosis, a negative result doesn’t rule out infection. This test is often the first step in tuberculosis diagnosis and is used in conjunction with culture tests and molecular methods for a comprehensive evaluation. It’s also valuable for monitoring treatment progress in patients with pulmonary tuberculosis.