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Types of TB test. There are a range of tests to show if you have TB, such as a sputum test, a culture test and x-rays. Chest x-ray. A chest x-ray can show damage in your lungs, but you might need further tests to prove you have TB, such as sputum and culture tests or scans.
If you have recently been infected with TB bacteria, your TB skin test reaction may not. be positive yet. You may need a second skin test 8 to 10 weeks after the last time you. spent time with the person with TB disease.his is because it can take several weeks after infection for your immune system to react to the TB skin test. If your reaction to the second test is negative, you probably do not have TB infection. TB blood tests TB blood tests use a blood sample to ind out if you are infected with TB bacteria.