MTB DNA PCR (URINE)
Also Known As
Test Parameters Included
- Mycobacterium tuberculosis DNA Detection (Qualitative) - PCR amplification of MTB-specific genetic targets in urine
- Pathologist Molecular Microbiology Remark - correlated with clinical suspicion of genitourinary tuberculosis
Department
Methodology
Sample Required
Preparation
Schedule Report
24 hours
Emergency Report
Yes
Frequently Asked Questions
What does MTB DNA PCR in urine detect?
It detects Mycobacterium tuberculosis genetic material in urine, helping diagnose genitourinary tuberculosis, which accounts for 10–15% of extrapulmonary TB cases.
Is this test better than urine culture for TB?
PCR provides faster results (usually within 24 hours) compared to culture, which can take 4–8 weeks. However, culture remains the gold standard as it also allows drug sensitivity testing.
How should urine sample be collected?
A clean-catch midstream urine sample of at least 25 ml is preferred. First-void morning urine may yield higher bacterial concentration and is sometimes recommended for better sensitivity.
Does this test replace a chest X-ray or sputum test?
No. This test specifically checks for TB in the urinary tract. Pulmonary TB is evaluated through sputum tests and chest imaging. Your doctor may order both depending on your symptoms.
What do positive and negative results mean?
A positive result indicates MTB DNA is present, suggesting genitourinary TB infection. A negative result does not completely rule out TB, as low bacterial load may fall below the detection threshold.
How to access the report?
Verified PDF report is available within 24–48 hours via www.drpatholab.in or WhatsApp/Email after sample collection.
Test Description
Test Code
M25
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