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A member asked:
What is the incidence rate of false positive for dfa type testing?
A doctor has provided 1 answer
I don't think I can: give you a general rate of false positivity for direct fluorescent antibody testing. The test will be positive when there is a sufficient number of antibodies present to cross the threshold and register a positive. It is very accurate for viruses, especially respiratory, if enough antibodies are present.DFA can also detect immunoglobulins/complement but often not whether disease present,i.e. lupus
Answered 4/10/2017
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