T-SPOT.TB

T-SPOT.TB is a blood test used to detect if someone has been infected with the bacteria that causes tuberculosis (TB). It works by measuring how the immune cells in your blood respond to TB-specific proteins. If these cells react strongly, it suggests a current or past infection with TB bacteria. The test doesn't distinguish between active TB disease and latent infection, but it helps doctors determine if further testing or treatment is needed. T-SPOT.TB offers a quick, accurate way to identify TB infection, especially useful for people who have had vaccines or other conditions that can affect traditional skin tests.