RE: Is it possible to frig a +ve from the Avacta test?1 Jul 2021 22:57
Riesgo - IDK the answer and without trying it, no-one will. Unsurprisingly, manufacturers tests their product against the designed performance envelope and defined failure states, not for the more outlandish ways users could intentionally manipulate it - so I doubt Avacta know either.
However, while not being a scientist, I would suggest that given the way in which LFT's work - migrating a conjugated label (Affimer) from an immobilized reservoir to a signal line (if the target is present) - it would be possible to trigger a false positive in any test with the right solvent.
I would hazard a guess that given regents can be released from binding sites through changes in PH levels (elution), the use of a suitably alkaline or acidic (Orange Juice) solvent can release the regent from the reservoir in the absence of the virus, triggering a false positive signal.
That might be complete *******s, but I think its a vaguely coherent answer...