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Where can I get tested for TB?
Unfortunately, CDPH no longer provides routine TB screening services to the public. Many health clinics and doctor’s offices in Chicago can test someone for TB. For a list of some of the places in Chicago, please visit here. CDPH recommends that members of the public requiring TB screening contact these clinics directly to verify availability and cost of TB screening.
How do you test tested for TB and what does my test mean?
A skin test or TB blood test can be used to help detect TB in a person. The skin test is performed by injecting a small amount of fluid (called tuberculin) under the skin, usually on the lower part of your arm. The results of the test are read 48 to 72 hours after the test, by a trained healthcare worker. A TB blood test is performed by drawing blood from a person and sending it to a lab for testing.
A positive test tells us that a person is infected with TB germs, but it does not necessarily mean that you have TB disease. A person can be infected with MTB that is not causing illness. This is called “latent TB infection” or LTBI.
If you have a positive test, further medical evaluation and testing, such as a chest x-ray, reviewing medical history or other labs tests is needed to make sure you do not have TB disease. TB disease is treated by taking several drugs as recommended by a health care provider.
What if I have LTBI?
A person with latent TB infection is not contagious at all. A person with LTBI is at risk of developing the illness TB (about 5-10% over a person’s lifetime). LTBI can be treated to make sure that you never develop active TB disease.
I received BCG vaccine as a child. Can I still get TB?
Many countries in the world routinely administer BCG vaccine. BCG does not prevent a person from becoming infected with TB or developing TB disease. If you received BCG vaccine, a blood test may be more accurate than a TB skin test.
How often should I get screened for TB?
People with low risk of infections generally do not need regular screenings for TB. However, certain individuals should be tested regularly. According to the CDC, this includes:
For more information about TB, you can visit the Centers for Disease Control and Prevention website.