A DLC test alone cannot definitively diagnose tuberculosis (TB), an infectious disease caused by the bacterium Mycobacterium tuberculosis. However, it can provide information that may raise suspicion of an infection. In TB cases, DLC results may show an increased lymphocyte count, reflecting the body's immune response to the infection. To diagnose TB accurately, healthcare providers use a combination of DLC results, clinical symptoms, and specific TB tests, such as the tuberculin skin test (PPD) or interferon-gamma release assays (IGRAs), along with chest X-rays and sputum tests. If you suspect TB or have symptoms consistent with it, consult your healthcare provider for appropriate testing and treatment. Early diagnosis and management are essential for TB control.