Tuberculin is a protein derived from m. tuberculosis infection of the cell walls. Copy specific cell wall protein removal, also called purified protein derivatives protein filtered or injection into the skin to skin tests to see whether there will be a reaction of the body to resist? If there is a positive reaction against, sum, mean that the body is immune resistance tuberculosis infection. Where resistance might come from a number of people have received the very first tuberculosis infection (Latent TB) or it may be derived from a vaccination in the past, they have b-CG. Therefore, the detection of Latent TB is not specific for TST!
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