The different types of tuberculosis
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Tuberculin test

tuberculin test

Tuberculin test is a skin test to determine the presence of tuberculosis . A small amount of PPD (purified protein derivative of tuberculin) is injected  into the skin. If the person has no inflammation around the site of the injection after two days, he/she is considered to be free of tuberculosis. Inflammation of the site always indicates some evidence of infection,  but X rays and other tests maybe needed to determine whether the tuberculosis lesion is active

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