A member asked:

Tb blood tested negative but tb skin testd positive, what is that mean? continuous low grade fever, swollenlumpnodes, sore thrt, hiv pcr rna negative.

2 doctors weighed in across 2 answers

Dr. Vincent Rizzo answered

Ppd: a positive PPD only means you were exposed to TB at some point in the past. you should have a chest x Ray.

Answered 6/10/2014

4.1k views

Contradictory Tb tst: Quantiferon-TB(the blood test) and the PPD(skin test) are not recommended together. The quantiferon test has more sensitivity/specificity(measures for how good medical tests are) but the gold standard is culturing the bacteria from either tissue or sputum which should be attempted if their is clinical suspicion for TB infection.

Answered 1/5/2019

4.1k views

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A member asked:

Tb blood tested negative but tb skin testd positive, what is that mean? continuous low grade fever, swollenlumpnodes, sore thrt, hiv pcr rna negative.

2 doctors weighed in across 2 answers

Dr. Vincent Rizzo answered

Dr. Ihtishaam Qazi answered

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