AFB Smear/Zn Stain

Overview:
The AFB (Acid-Fast Bacilli) smear with ZN (Ziehl-Neelsen) stain is a laboratory test used to detect the presence of acid-fast bacteria, particularly Mycobacterium tuberculosis, the bacteria responsible for tuberculosis (TB). The test involves applying a special stain to a sample (such as sputum or tissue) and examining it under a microscope to identify the bacteria.

What it detects:
It detects the presence of acid-fast bacilli, which are typically associated with tuberculosis and other mycobacterial infections.

Who should get it:
Individuals with symptoms of tuberculosis, such as persistent cough, night sweats, weight loss, or a history of exposure to TB, may be recommended for this test.

Sample required:
A sample of saliva is required for this test.

Fasting requirements:
Fasting is not required for this test.

Processing time:
Results available within 24-48 hours.