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 >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,
|Usually treated by taking one medicine for 9 months.
||Treated by taking three or four medicines for at least
Updated Wednesday, 30-Mar-2011 08:38:53 CDT