: Mycobacterium species Identification by Sequencing

: What This Test Does

: The test reads genetic material (DNA) from a mycobacterium in your sample and compares it to known reference sequences. This allows the laboratory to name the exact species rather than just confirming that some mycobacterium is present.

: Why Species Identification Matters

: Different mycobacteria require very different treatments. Members of the Mycobacterium tuberculosis complex need specific antibiotic regimens, while many non-tuberculous mycobacteria are handled differently or may not need treatment at all. Knowing the species helps your care team choose the right approach.

: How the Sample Is Collected

: The sample depends on where the infection is suspected and may include sputum, other respiratory specimens, tissue, or fluid. Your provider will explain how your particular sample will be collected. Molecular testing is often run on a specimen that has already shown mycobacteria by another method.

: What Results Mean

: A result names the species or group detected, which your provider interprets alongside your symptoms, imaging, and other tests. A result that does not identify a species, or that is negative, does not by itself rule infection in or out and is interpreted in context.