MTB-NAT Detail

MTB-NAT (Mycobacterium tuberculosis – Nucleic Acid Amplification Test) is a rapid molecular test used for the detection of Mycobacterium tuberculosis complex (MTBC) DNA in clinical samples such as sputum, BAL fluid, pus, CSF, or tissue. The test also detects rifampicin resistance, which is a key marker for multi-drug resistant TB (MDR-TB).

This test is based on real-time PCR or other nucleic acid amplification technologies and is commonly known under platforms such as CBNAAT or GeneXpert.

Key Uses:

• Rapid diagnosis of pulmonary and extrapulmonary tuberculosis

• Detection of rifampicin resistance

• Helps in early initiation of appropriate anti-TB therapy

• Especially useful in smear-negative or pediatric TB cases

Advantages:

• High sensitivity and specificity

• Results within 1–2 hours

• Useful for drug-resistant TB detection

• Recommended by WHO for first-line TB diagnosis

This test plays a crucial role in TB control programs, especially in high-burden countries, by enabling early and accurate diagnosis and reducing transmission.