Tuberculosis (TB) is a disease caused by bacteria called mycobacterium tuberculosis. The bacteria usually attack the lungs, but can attack any part of the body, such as the kidneys, spine, and brain. If not treated properly, TB can be deadly.
TB in the lungs or throat can be spread to other people. The germs are put into the air when a person with active TB disease of the lungs or throat coughs or sneezes. People nearby may breathe in the germs and become infected. People with active TB disease are most likely to spread it to people they spend time with every day, such as family members, friends, or co-workers.
Persons with active TB may:
The most common tool for diagnosing TB is a simple skin test. If a TB test is positive, further tests, such as a chest x-ray, may be needed.
TB is treated with medicines. People with TB will have to take these medicines for many months to make sure all the TB germs are gone from their bodies.
Despite better treatment, TB is still a very serious disease worldwide. It is estimated that one-fourth of the world's population is infected with TB. Today, there are also strains of TB that are resistant to medicines. People who do not take their TB medicine regularly, or do not finish all of their medicine, are at risk for getting these strains.
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People who have:
Most people who breathe in the TB germs and become infected are able to fight it off and keep it from growing. They have the TB germ in their body without being sick. This is often called latent TB infection or "sleeping TB." People with latent TB infection: