TB Testing: Who Needs It, What a Positive Result Means
Tuberculosis (TB), a contagious bacterial infection primarily affecting the lungs, remains a health risk in the U.S. Though cases declined for decades, recent increases — including ~10,347 cases in early data from 2024 — suggest testing and treatment of latent TB is needed more than ever. Testing is crucial both for diagnosing latent TB (where bacteria are present but symptoms are absent) and active TB disease (which is contagious and manifests symptoms).
