Sputum AFB
The Sputum AFB test detects acid-fast bacilli in sputum to help diagnose tuberculosis and related infections.
The Sputum AFB (Acid-Fast Bacilli) test is a laboratory test used to identify acid-fast bacteria, particularly Mycobacterium tuberculosis, in a sputum sample (mucus coughed up from the lungs).
The sample is stained and examined under a microscope to detect the presence of these bacteria. This test is commonly used in the diagnosis of pulmonary tuberculosis and helps determine whether a person is infectious.
It may be performed as a single sample or multiple samples over consecutive days for better accuracy. The test is often used along with culture or molecular tests for confirmation and treatment planning.
The purpose of this test is to
- To detect acid-fast bacilli in sputum
- To help diagnose pulmonary tuberculosis
- To identify mycobacterial infections
- To assess infectious status
- To support treatment monitoring