Mycobacterium tuberculosis Nucleic Acid Detection by Probe-Based Assay (Qualitative)

How the Test Works

The test uses a specialized probe to detect genetic material (nucleic acids) from *Mycobacterium tuberculosis* in your blood. If the bacteria are present, the probe binds to their DNA, triggering a positive result. This method is highly sensitive and specific for active TB infection.

What to Expect Before the Test

No special preparation is needed. You may have a small blood sample drawn from your arm, similar to other routine blood tests. If you’re on blood-thinning medication or have a history of bleeding disorders, let your healthcare provider know.

What the Results Mean

A positive result indicates the presence of *Mycobacterium tuberculosis* DNA, suggesting an active TB infection that likely requires treatment with antibiotics. A negative result means the test did not detect the bacteria’s genetic material, but other tests or follow-up may still be needed if you have symptoms or risk factors.

When This Test Is Used

This test is typically used in patients with symptoms of TB (such as persistent cough, fever, or weight loss), those who have been exposed to TB, or individuals with risk factors like weakened immune systems or recent travel to areas with high TB rates. It can also be used as part of screening for TB in healthcare settings.