RE: Review of main worldwide Antigen Covid 19 LFT’s - Mologic one of the best15 Sep 2021 19:17
Let’s look at that TW
PD didnt think at the time there was any difference, this later and arguably more comprehensive study - which is similar to the Welcome Trust study - in identifies Mologic as one of the best antigen tests in the world -
‘Some tests showed impaired performance when using freeze–thaw material and/or Amies media. These findings highlight the importance of understanding assay specific performances and the need to select the appropriate sample matrix and the right test for each intended use, particularly for laboratories and evaluation programs that seek a rapid validation of Ag-RDT using frozen stored samples and ‘off-label’ specimen preparations. The LODs obtained in this comprehensive assessment of analytical sensitivity are consistent with rapidly emerging clinical performance data9,11,37 demonstrating the high clinical accuracy of Ag-RDTs for rapid detection of individuals with high viral loads, which can be very impactful for initiation of isolation and tracing measures’
Without doubt PD’s original specification regarding freezing is now looking flawed.
‘The effect of storage at - 80 °C and one freeze–thaw cycle was evaluated, with eleven Ag-RDTs showing a loss of sensitivity by up to 20-fold. A small decrease in sensitivity has been reported in in SARS-CoV-2 RT-PCR testing (1 RT-PCR cycle threshold) after one and two freeze–thaw cycles29 but there are no studies so far that have reported the effect of freeze–thaw on antigen detection. Results here highlight that the use of frozen material with Ag-RDTs should be performed with caution. The fact that three tests showed two-to-five-fold better sensitivity after an additional freeze thaw-cycle could not be explained in here, a further investigation is required with a larger sample size to rule out whether this phenomenon was within the margin of error of the experiment’
Nice to see Mologic appears to be the best home test in the world as well, this evaluation was a real boost today, I think we can see why Omega are so bullish