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What is a TB skin test?

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A tuberculin skin test, also referred to as a Mantoux tuberculin test, is done to evaluate if an individual has been exposed to tuberculosis, states WebMD. TB protein is injected into the forearm beneath the top layer of skin.

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Individuals with positive skin tests develop a rigid red bump at the injection site, reports WebMD. Further testing may be conducted to determine TB disease or latent TB infection, says the Centers for Disease Control and Prevention. A treatment plan is then formulated for the patient. Tuberculosis is a disease that is passed through the air. Symptoms of TB disease include cough, fever, night sweats and weight loss.

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