AFB tests are most often used to diagnose an active tuberculosis (TB) infection, especially after a positive result in a TB screening test. A TB screening test can't tell the difference between an inactive …

Apr 26, 2025 · Your doctor may use an acid-fast bacteria (AFB) stain test to see if you have a lung disease like tuberculosis (TB).

Using a microscope, laboratory personnel look for AFB. If AFB are found on a sputum smear, it often indicates TB disease (smear positive). However, a positive smear does not confirm a diagnosis of TB …

Our laboratory provides AFB smear testing from sputum or other clinical specimens within 24 hours using fluorescent microscopy. These acid-fast bacilli assays are performed six days a week and by …

The Acid-Fast Bacillus (AFB) test is a laboratory procedure used to detect the presence of acid-fast bacteria, such as Mycobacterium tuberculosis, in a patient's sample.

Positive cultures are reported as soon as detected. AFB stain, AFB identification of positives, and susceptibility tests are billed separately from culture. Identification of positive culture is billed by …

Calculate your TB exposure risk with our free AFB test calculator. Learn about acid-fast bacilli screening, symptoms, and treatment options.

Complete guide to Acid Fast Bacilli (AFB) test cost, procedure, and results. Learn how it helps diagnose tuberculosis and other bacterial infections.

The AFB test for tuberculosis involves examining a sample of sputum—mucus expelled from the lungs—under a microscope to detect acid-fast bacilli, which are indicative of TB infection.

Sep 4, 2025 · What does the test result mean? Acid-fast bacilli (AFB) smear-positive sputum is usually the first indication of mycobacterial infection and potential TB disease.