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A member asked:
Had 2 blood tests for hla b27. 1st test came back positive; 2nd test (pcr) came back negative. what would be the difference between the two tests?
A doctor has provided 1 answer
HLA B27 Asssay: The pcr method has better sensitivity and specificity than the 1st test, antigen assay. Your symptoms and other clinical findings are more important.
Answered 7/11/2013
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