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Does TPHA Assay Show False Positive Result Due To Viral Infections?
hi! Good Day! I have a result of my blood test -TPHA nonreactive gray assay, the clinic / physician won t give me the FIT to work certificate for my overseas employment, since the values of my result (0.277) were borderline as what the clinic staff says. I have to repeat the test 2times and the result must be both negative. I have consulted other specialists (OB-GYNE, INTERNAL MED, INFECTIOUS Doctors) they said it s nonreactive nothing to worry. There s a false positive result of TPHA due to viral infections. I m so worried, my husband and I don t practice multiple partners. I really need to have the clearance from that clinic.
Thu, 26 Mar 2015
Hi,
Welcome to HCM.
There is no possibility of False positive result with TPHA, as its a specific test and the antigen is derived from Treponema Pallidum if it had been performed correctly.
At the same time, there is nothing like borderline. Either negative or a positive result only. Anything below the cut off value is negative only. The values did reflect the severity of the disease.
DR S.Murugan
Welcome to HCM.
There is no possibility of False positive result with TPHA, as its a specific test and the antigen is derived from Treponema Pallidum if it had been performed correctly.
At the same time, there is nothing like borderline. Either negative or a positive result only. Anything below the cut off value is negative only. The values did reflect the severity of the disease.
DR S.Murugan
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