What is the Difference Between Latent TB Infection and Active TB Disease?
|Latent TB Infection||Active TB Disease|
|TB germs are dormant (asleep) in your body. This phase can last for a very long time - even decades.||TB germs are reproducing and spreading in your body, causing tissue damage.|
|You don't look or feel sick. Your chest X-ray usually is normal.||You usually feel sick. Typical symptoms include: cough lasting more than 3 weeks, weight loss, night sweats, and fever. A chest X-ray and other tests are needed to diagnose TB disease.|
|You can't spread TB to other people.||If the TB germs are in your lungs or voicebox, you may spread TB to other people by coughing, sneezing, talking, or singing.|
|Usually treated by taking one medicine for 9 months.||Treated by taking three or four medicines for at least 6 months.|
More information about Active TB Disease