Description
Blood, NA, Fasting or Non Fasting: As suggested by doctor
Sample Required:
Pleural fluid obtained through a diagnostic procedure called thoracentesis.
Test Time:
Results are usually available within a few hours to a day after sample collection.
Test Normal Range:
The normal range does not apply to this test. The presence of acid-fast bacilli (AFB) in the pleural fluid suggests a potential tuberculosis infection.
What is the Test?
The AFB Stain, Pleural Fluid test is a microscopic examination of pleural fluid to detect the presence of acid-fast bacilli (AFB). AFB are characteristic of mycobacteria, including Mycobacterium tuberculosis, the causative agent of tuberculosis.
Test Procedure:
A sample of pleural fluid is collected through thoracentesis and then processed for staining using the Ziehl-Neelsen stain. The stained slide is examined under a microscope for the presence of red-stained AFB, which appear against a blue background.
When to Take the Test:
This test is ordered when there is a suspicion of tuberculosis infection involving the pleural cavity, which can cause pleural effusion.
Who Should Take This Test:
Individuals who present with pleural effusion, especially when tuberculosis infection is suspected, may undergo this test.
Precautions for Exceptional Cases:
Pregnant individuals and those with compromised immune systems should inform their healthcare provider before taking the test.
FAQs:
Q1: What is pleural fluid?
A: Pleural fluid is a clear fluid that lubricates the space between the layers of the pleura, the thin membranes surrounding the lungs.
Q2: Is thoracentesis a painful procedure?
A: The procedure may cause some discomfort, but it is usually not very painful. Local anesthesia may be used to numb the area.
Q3: What if AFB are found in the pleural fluid?
A: The presence of AFB suggests a potential tuberculosis infection. Further testing, such as culture and drug sensitivity testing, may be needed for confirmation and appropriate treatment.
Q4: How is thoracentesis performed?
A: During thoracentesis, a thin needle is inserted between the ribs into the pleural space to collect pleural fluid.
Q5: Is tuberculosis contagious through pleural fluid?
A: Tuberculosis is primarily transmitted through the air when an infected person coughs or sneezes. Transmission through pleural fluid is rare.
