How is a person tested for TB?

The tuberculin skin test is used to find out whether a person is infected with the TB germ. It does not tell whether the person has TB disease. For the skin test, a small amount of fluid–called tuberculin–is injected under the skin in the lower part of the arm. Two or three days later, a health care worker checks the site of the injection to see if there has been a reaction.

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1. What is tuberculosis?
2. What is the difference between TB infection and TB disease?
3. Are some people at greater risk of getting TB?
4. How serious is the problem among minorities?
5. What are the symptoms of TB disease?
6. How is TB spread?
7. How is a person tested for TB?
8. What does a positive reaction mean?
9. How is TB disease treated?
10. How is TB infection treated?