CBNAAT / TrueNat (TB PCR)
Also known as: GeneXpert, TB PCR
Category: MicrobiologySample: SputumReport in: Same Day
A rapid molecular test that detects TB and rifampicin resistance in about two hours; free under the national programme.
Why it's done
- Diagnose TB
- Detect drug resistance
What it measures
TB DNA and rifampicin resistance genes.
Preparation
Early morning sputum sample.
Normal range
MTB not detected
Understanding results
Detected confirms TB; resistance result guides treatment.
Related conditions
Frequently asked questions
Why is the CBNAAT / TrueNat (TB PCR) test done?
Diagnose TB, Detect drug resistance
How do I prepare for CBNAAT / TrueNat (TB PCR)?
Early morning sputum sample.
What is the normal range for CBNAAT / TrueNat (TB PCR)?
MTB not detected
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.