biological false positive

A lab result that is positive in a person who is known to be a true negative for the substance being measured

biological false positive

A lab result that is positive in a subject who is known to be a true negative for the substance being measured. See Ulysses syndrome.
References in periodicals archive ?
In addition, biological false positive reports are seen in a variety of clinical conditions.
This difference is due to biological false positive serum sample.
As the non-treponemal tests also lack sensitivity in late stage infection, screening with a non-treponemal test alone may also yield false positive reactions in various acute and chronic conditions in the absence of syphilis (biological false positive reactions)1-4,7,18,19 While the VDRL or RPR test alone is very useful for screening infectious syphilis, it will fail to diagnose many primary and late latent/late syphilis as the sensitivity is 44-76% and 70-73%, respectively4.