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A member asked:
What constitutes a 2-step tst?
4 doctors weighed in across 4 answers
PPD: 2 step tst is bascially having a second PPD test repeated within 1 month of the first ppd.
Answered 9/28/2016
6.1k views
The CDC knows!: Here is a great page from the cdc that has all the information you need: http://www.Cdc.Gov/tb/publications/ltbi/diagnosis.Htm.
Answered 11/12/2012
5.5k views
Museum of History: Two skin tests now replaced with one simple blood test - igra.
Answered 1/5/2019
5.5k views
A 2 step TST is: Serial tests 2 weeks apart. This short interval implies an old positive test and not a skin test conversion.
Answered 11/19/2012
5.5k views
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