Acid Fast Bacilli Stain (Z. N. Stain)
4.6 (5 reviews)A microscopic test used to detect acid-fast bacteria, mainly Mycobacterium tuberculosis, in clinical samples.
₹99.00 ₹200.00
Test Details
Also Known As
AFB Stain Test, Ziehl–Neelsen Stain, ZN Stain Test, Tuberculosis Microscopy Test, Acid Fast Stain
Sample Type
Sputum, body fluids, tissue, pus
Gender
Male, Female
Age Group
All Ages
Categories
Pathology
Test Code
Pulmonary/Extra Pulmonary (sputum/BAL/urine/pus)
The Acid Fast Bacilli (AFB) Stain, also known as Ziehl–Neelsen (Z. N.) Stain, is a laboratory staining technique used to identify acid-fast organisms, particularly Mycobacterium tuberculosis, the causative agent of tuberculosis (TB). Acid-fast bacteria retain the red dye even after acid-alcohol decolorization due to their waxy cell wall. This test is commonly performed on sputum and other body samples to aid in the rapid diagnosis of pulmonary and extrapulmonary tuberculosis and to assess infectiousness and treatment response.
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Frequently Asked Questions
It detects acid-fast bacteria, mainly Mycobacterium tuberculosis.
It is a rapid screening test; culture or molecular tests may be needed for confirmation.
Sputum is most commonly used for suspected pulmonary tuberculosis.
Results are usually available within the same day or 24 hours.
Yes, it can detect acid-fast organisms, but it cannot differentiate species.
Fasting is not required.
