Sputum AFB Smear
Also known as: Sputum for TB, Ziehl-Neelsen Stain
Category: MicrobiologySample: SputumReport in: Same Day
Examines coughed-up sputum under a microscope for TB bacteria.
Why it's done
- Diagnose lung TB
What it measures
Acid-fast bacilli in sputum.
Preparation
Give an early-morning deep-cough sample, not saliva.
Normal range
Negative
Understanding results
Positive means infectious pulmonary TB.
Related conditions
Ordered by
Frequently asked questions
Why is the Sputum AFB Smear test done?
Diagnose lung TB
How do I prepare for Sputum AFB Smear?
Give an early-morning deep-cough sample, not saliva.
What is the normal range for Sputum AFB Smear?
Negative
Medically reviewed by
Medical review pending
Last updated
9 October 2026
Sources
- ICMR standard treatment workflows
- Reference ranges vary by laboratory - always read your report with your doctor
This information is for general awareness and does not replace advice from a qualified doctor. Do not start, stop or change any medicine without medical advice.