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A member asked:
A red like a bite of mosquito, is it considered positive for tb skin test?
A doctor has provided 1 answer
Swelling important..: Redness is not important, but induration (swelling) is when reading a TB test. For normal healthy person, induration of > 15 mm is considered positive. Other clinical situations may warrant calling >10 mm of induration positive.
Answered 8/17/2018
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